Foul Play By Beverly Scudamore

Remy And Alison Play On rival soccer teams. Remy hasn't trusted Alison ever since her former friend attended an elite soccer camp in England last summer. When Remy finds out Alison has a special plan to beat Remy's team in the tournament, she becomes convinced that Alison will sabotage her team's players. Foul Play is an entertaining story of misguided revenge, and the importance of communication in true friendship.
 
- Goodreads Summary