Germany to 'play to win' despite possible Spain last 16 clash
Germany have already qualified for the knockout stages and will be first in the group with a win or a draw against the Swiss in Frankfurt on Sunday.
That will however put them on track for a match-up with Spain, who are also on course to top their group and have been among the best teams at the tournament so far.
"I think it's normal to discuss these topics," said Nagelsmann. "At the end of the day it's difficult to talk to your team and tell them to lose tomorrow.
"That doesn't make sense for competitive people. Normally you play a football game to win and tomorrow's a game to win."
The 36-year-old coach also said Germany or any other team could be caught out by thinking too far in the future.
"We cannot predict who will be the opponent exactly in the knockout stage, but at the end it's just about getting more confidence and more rhythm, by winning games in a row.
"Tomorrow's the next game we want to win it, it doesn't matter who will be the next opponent. We'll know our next opponent Tuesday at 11pm and will have time to prepare it."
Switzerland sit second in the group on four points and will guarantee second place with a draw.
Nagelsmann called opposing coach Murat Yakin "a great manager who I hold in high esteem", while singling out Switzerland as "the strongest opponents in the group".
"It'll be an interesting match - and we want to win."