The Hammers will face Fiorentina at the Fortuna Arena in Prague on 7th June, after the Italians beat Basel 3-1 after extra time (4-3 on aggregate) in the other semi-final.
You can re-live all the action with our minute-by-minute updates below or click here to read all the stats from the match.
Live commentary
90+7' That's it! Ivan Kruzliak has blown his whistle and the game is over.
90+6' Flynn Downes (West Ham) joins the action as a substitute, replacing Lucas Paqueta.
90+4' 0 - 1 Goal! Pablo Fornals (West Ham) weaves his way past opponents, and he unleashes a magnificent effort from the edge of the box into the bottom left corner. Mathew Ryan had no chance of reaching it. The score is 0:1.
90+2' Yukinari Sugawara (AZ Alkmaar) sends a lofted cross into the penalty area. Unfortunately for him, the opponent's defence deals with his cross comfortably and intercepts it.
90' There will be a minimum of 5 min. of added time.
90' Yukinari Sugawara (AZ Alkmaar) tries to find Mexx Meerdink, but he puts too much power on the through ball. The ball is off of the pitch and it's a goal kick for West Ham.
88' Alphonse Areola (West Ham) has picked up a minor injury, but it looks like he will be able to continue.
87' Alphonse Areola (West Ham) is down injured and the referee stops play so that he can receive medical treatment.
87' Mexx Meerdink (AZ Alkmaar) goes down in the box after a challenge from the defender. Possibly unsighted, the referee just waves play on.
85' Substitution. Jesper Karlsson will be replaced by Mexx Meerdink (AZ Alkmaar).
85' Here is a change. Milos Kerkez is going off and Pascal Jansen gives the last tactical orders to Mees de Wit (AZ Alkmaar).
84' The referee signals that it is time for a substitution and Danny Ings (West Ham) will replace Michail Antonio.
83' A rebound spins to Nayef Aguerd (West Ham) inside the box, but his sliced shot flies just wide of the right post.
82' Jarrod Bowen (West Ham) whips in a cross from the corner, but Mathew Ryan is well positioned and punches the ball away.
81' Ivan Kruzliak blows his whistle for a foul after Vangelis Pavlidis (AZ Alkmaar) hacks down one of his opponents.
79' Thilo Kehrer (West Ham) takes the resultant free kick from the edge of the box and tries to find one of his teammates with a cross, but the keeper climbs high and gets to it first, collecting the ball with ease.
78' Pascal Jansen prepares a substitution. Myron van Brederode is replaced by Mayckel Lahdo (AZ Alkmaar).
77' Jordy Clasie (AZ Alkmaar) strikes from the edge of the box, but hits it really poorly and sends the ball way over the bar.
75' It will be a substitution. Pablo Fornals (West Ham) is ready to enter the pitch as Mohamed Said Benrahma walks off.
75' Jesper Karlsson (AZ Alkmaar) fires the ball at goal from inside the area, but it's well blocked.
74' Jarrod Bowen (West Ham) attempts to find his teammate with a final pass from outside of the box, but one of the defenders clears the ball to safety.
73' Ivan Kruzliak interrupts the game for a tactical foul by Kurt Zouma (West Ham).
72' Nayef Aguerd (West Ham) sends a long ball forward to Michail Antonio, but he put too much power and the chance is gone. It's a throw-in for AZ Alkmaar.
71' The linesman raises his flag for offside before Vangelis Pavlidis (AZ Alkmaar) heads on.
70' Pascal Jansen has decided to make a change. Dani de Wit (AZ Alkmaar) replaces Sven Mijnans.
67' Jesper Karlsson (AZ Alkmaar) finds space on the edge of the box, but his wild shot goes high over the bar.
66' Pantelis Chatzidiakos (AZ Alkmaar) receives a low pass just outside the box and unleashes a fine strike to the bottom left corner. Alphonse Areola pulls off a reflexive save to block his effort. Nice goalkeeping skill.
66' Jesper Karlsson (AZ Alkmaar) attempts to send over a cross in order to find one of his teammates, but an opposition defender averts the danger by intercepting the effort.
65' Lucas Paqueta (West Ham) takes a first-time shot from the edge of the box, but his effort is well blocked by the defender.
64' The referee has issued a yellow card to Thilo Kehrer (West Ham).
62' Vangelis Pavlidis (AZ Alkmaar) is flagged for offside.
62' The corner from Aaron Cresswell (West Ham) is hurriedly cleared.
61' Thilo Kehrer (West Ham) crosses the ball into the box from the free kick, but the defence clears the danger.
60' Ivan Kruzliak blows his whistle after Milos Kerkez (AZ Alkmaar) kicks an opponent's legs instead of the ball. It's a free kick to West Ham, but it's in no position for a direct shot on goal.
60' Tomas Soucek (West Ham) is given a yellow card.
58' Vangelis Pavlidis (AZ Alkmaar) goes down under a challenge in the box, but the ref immediately waves away the appeals from all players.
57' The referee blows his whistle, a clear handball by Jarrod Bowen (West Ham).
56' Jarrod Bowen (West Ham) swings in the corner, but the goalkeeper does a brilliant job to intercept the effort.
55' Declan Rice (West Ham) gets into a good scoring position. He creates some space for himself and tries his luck from distance. His decent effort towards the bottom right corner is, however, superbly saved by Mathew Ryan! The ball goes out of play. West Ham are awarded a corner kick.
54' Tijjani Reijnders (AZ Alkmaar) plays a lovely through ball to Vangelis Pavlidis, but he can't beat Alphonse Areola and loses the ball.
52' Lucas Paqueta (West Ham) tries to find Mohamed Said Benrahma, but he puts too much power on the through ball. The linesman signals a throw-in for AZ Alkmaar.
51' Sven Mijnans (AZ Alkmaar) fails to find any of his teammates inside the box as his pass is blocked. AZ Alkmaar will take a corner kick.
49' Sven Mijnans (AZ Alkmaar) unleashes a close-range volley towards the bottom left corner, but his effort is thwarted by the keeper, and the score remains unchanged.
48' Milos Kerkez (AZ Alkmaar) tries to find Vangelis Pavlidis, but he puts too much power on the pass.
47' A lofted cross from Milos Kerkez (AZ Alkmaar) is unsuccessful as the opponent's defence quickly clears the ball out of the penalty area.
46' Referee Ivan Kruzliak blows his whistle to start the second half.
45' The referee blows his whistle to end the first half and the players are now heading to their respective dressing rooms.
43' Lucas Paqueta (West Ham) gets to the ball in the penalty box and immediately fires a first-time effort. He didn't hit the ball properly and skies it high over the crossbar. The ball is off of the pitch and it's a goal kick for AZ Alkmaar.
41' Sven Mijnans (AZ Alkmaar) sends the corner into the box, but Alphonse Areola intercepts it and averts the threat.
41' Yukinari Sugawara (AZ Alkmaar) volleys the ball towards goal from the edge of the penalty box, but one of the defenders blocks his shot. AZ Alkmaar have a corner.
37' The resulting corner from Sven Mijnans (AZ Alkmaar) comes to nothing.
37' One of the defenders reacts at the last minute to brilliantly block a pass from Yukinari Sugawara (AZ Alkmaar). The ball is out of play. AZ Alkmaar will have a chance to score from a corner.
34' Tomas Soucek (West Ham) sends a teasing cross into the area, but Mathew Ryan intercepts the ball.
33' Tijjani Reijnders (AZ Alkmaar) unleashes a powerful shot towards goal, but it is bravely blocked by a self-sacrificing defender.
32' A fine lofted pass into the box, sent by Milos Kerkez (AZ Alkmaar), is intercepted by the opposition's defence.
32' Jordy Clasie (AZ Alkmaar) hammers the ball towards goal from long-range, but one of the defenders reacts brilliantly to block the shot.
28' Mohamed Said Benrahma (West Ham) sets himself up on the edge of the box, but balloons his shot way over the bar. The ball goes out of play and AZ Alkmaar will have a goal kick.
27' Vangelis Pavlidis (AZ Alkmaar) was trying to get to the ball but clattered into the legs of the opponent as well. Ivan Kruzliak blows his whistle for an infringement.
25' Lucas Paqueta (West Ham) takes a shot from outside the box and hits the left post! The ball goes out of play and AZ Alkmaar will have a goal kick.
24' Jarrod Bowen (West Ham) commits an ugly challenge. The referee sees it and immediately blows his whistle.
22' Tijjani Reijnders (AZ Alkmaar) clips a neat ball into the box in the direction of Vangelis Pavlidis, but he can't get on the end of the pass.
20' Lucas Paqueta (West Ham) tries to find Michail Antonio, but he puts too much power on the through ball. The ball is off of the pitch and it's a goal kick for AZ Alkmaar.
18' Milos Kerkez (AZ Alkmaar) swings a cross into the box, but it's far too close to Alphonse Areola, who smothers the ball.
17' The defence just can't clear the ball and a rebound eventually falls to Jarrod Bowen (West Ham) deep inside the box, but his well-hit shot flies just wide of the right post. The ball is off of the pitch and it's a goal kick for AZ Alkmaar.
17' Thilo Kehrer (West Ham) crosses the ball into the box, but one of the defending players averts the threat.
14' Mohamed Said Benrahma (West Ham) found some space to dink a cross from the side into the box, but it needed to be more precise to threaten the opposition. The ball goes out of play and AZ Alkmaar will have a goal kick.
13' Aaron Cresswell (West Ham) produces a lovely ball into the penalty area but the defender manages to intercept and comfortably averts the danger.
12' Jesper Karlsson (AZ Alkmaar) sends over a cross from the side into the penalty area in order to find one of his teammates, but he fails and the opportunity goes begging. The ball is off of the pitch and it's a goal kick for West Ham.
11' Nothing comes of the resulting corner from Sven Mijnans (AZ Alkmaar). The defence is alert and manages to cut it out.
11' Vangelis Pavlidis (AZ Alkmaar) attempts to find the head of one of his teammates with a promising cross into the box, but a defender outjumps the attackers and averts the threat. The referee and one of his assistants signal for a corner kick to AZ Alkmaar.
10' Thilo Kehrer (West Ham) sends a cross into the box, but the opposition's defence clears the ball to safety.
8' Vangelis Pavlidis (AZ Alkmaar) is offside and the linesman raises his flag.
7' Mohamed Said Benrahma (West Ham) sends a cross into the box, but Mathew Ryan comes off his line to gather the ball.
5' Mohamed Said Benrahma (West Ham) looks to break free, but an opposing player clears the ball away.
4' Myron van Brederode (AZ Alkmaar) brings an opponent down and Ivan Kruzliak interrupts the game.
3' Jesper Karlsson (AZ Alkmaar) is caught offside!
2' Jesper Karlsson (AZ Alkmaar) blasts the ball from just outside the box, but his attempt is blocked by the defender. The referee points to the corner flag. It's a corner to AZ Alkmaar.
1' Here we go, today's match is underway.
The players are out and the match is about to start. West Ham will kick-off.
Hello and welcome to AZ Alkmaar v West Ham in the second leg of the Europa Conference League semi-final. West Ham are 2-1 up from the first-leg and are just 90 minutes away from their first European final since 1976.
Can they do it? Stay tuned for our minute-by-minute updates.
The starting XIs have already been announced and you can see them below.
The referee tonight is Ivan Kruzliak.
Starting XIs
Preview
After squandering a first-half lead to lose 2-1 in the first leg of this UEFA Europa Conference League (UECL) semi-final, AZ Alkmaar have it all to do in their quest to reach a first European cup final in 47 years.
Unlike their visitors, Pascal Jansen’s men are enjoying a fine domestic season and are still fighting tooth and nail for a top-three finish with Ajax, and a rampant 5-1 win over Emmen on Sunday provided the perfect warm-up.
Alkmaar are the only side who’ve won two UECL groups coming into this and only the brave would back against them confidently, as they’ve maintained a perfect winning home record in this season’s competition (W8).
Their record against English opponents on Dutch soil is rock-solid, but far from impressive (W2, D5, L1), and it was a David Moyes-led Everton who inflicted that sole defeat back in 2007/08.
Moyes’ West Ham United fell to a fourth defeat across their last six competitive games in Sunday’s 2-0 defeat against Brentford, but they can perhaps be forgiven for the drop off in domestic form with their league status all but assured for next season.
The Hammers are potentially only 90 minutes from their first major European final since 1976, yet their powerful forward Michail Antonio has called for calm, stating “it’s far from over” in the wake of their reverse victory.
Hammers fans of a certain era may remember their four games across two historical knockout ties against Dutch opposition (W3, L1), they ultimately progressed from both and will be hoping to make it three for three here.
Yet, conceding nine goals across three straight travelling defeats may have some nerves jangling.
Quite simply, Moyes’ men will have nothing to play for if they don’t progress and his position may become untenable at the season’s conclusion.
Players to watch: Saïd Benrahma was crowned player of the UECL semi-final first legs after his six goal attempts and equalising goal, and he’s now scored crucial goals in victory in two of his last three appearances.
He’ll be trying to get the better of AZ and former Brighton keeper Mat Ryan; the Australian who remained unbeaten against the Irons until the first leg (W3, D2, L1).
Hot streak: West Ham have progressed from all 11 of their two-legged UEFA ties in which they won the first-leg at home.
