Jude Bellingham was questioning the referee's choice for the game.
The German Football Association fined Jude Bellingham 40,000 euros for questioning the appointment of the referee for the game between Borussia Dortmund and Bayern Munich.
Bellingham criticized Zwayer after the official's six-month ban for a match-fixing scandal in 2005.
The 18-year-old was fined for "unsportsmanlike behavior".
They will not appeal.
Zwayer gave their rivals a spot-kick for a Hummels handball after rejecting the appeals for a penalty. Robert Lewandowski scored the winning goal.
Bellingham said that the biggest game in Germany was fixed by a referee. What are you expecting?
It wasn't a penalty for me. ummels is fighting to get the ball and it hits him.
You can look at the decisions in the game.
The win in 'Der Klassiker' saw them move to the top of the table.
In July 2020 Bellingham joined the club from the team he had been with before, in a deal that could eventually be worth over 30 million dollars.
