The man of the match
Definition 1 of 1
Pro Tip 1/3Sport Specific
Used primarily in sports, implying an exceptional performance in a game. 
During the cricket match, the commentator eagerly awaited to announce the man of the match.
Pro Tip 2/3Gendered Term
While it refers to the best performer, it's traditionally male-focused but can refer to any gender. 
She was the man of the match in today's hockey game, showing outstanding skill.
Pro Tip 3/3Not Always Winning
The award can be given to players from any team, not necessarily from the winning side. 
Even though they lost, their goalkeeper was named the man of the match.