Isn't this just the match preparation? (part 1)

"A small 10 vs 10 practice session today, it's important that we know our advantages and disadvantages so we can improve upon that," Paul said handing a large book to Cory. "Call out the teams. Apparently, there's a coach meeting that I can't skip."

"I'm not needed?" Cory asked before Paul turned to leave.

"You are, but the team needs you more. Hopefully, it'll turn out fine." Paul waved at the team and walked toward the Statham main building.

"Okay! Just like we did when you guys first arrived. We're going to be separating into teams of 10 and playing a 30-minute match spread between two 15-minute halves, the teams are-" 

"Wait wait!!!! Wait! Aren't we 19 in total? Who's gonna be the last player? Surely it can't be Annabel. Not that girls can't play football or anything." Xavier asked.

"You'll be getting lime juice instead of water later. Just wait." Annabel responded.