 Believing the glee club members are becoming complacent ahead of the forthcoming <unk> , director Will Schuester ( Matthew Morrison ) divides the club into boys against girls for a mash @-@ up competition . <unk> coach Sue Sylvester ( Jane Lynch ) observes that head cheerleader Quinn <unk> 's ( Dianna Agron ) performance standards are slipping . When Quinn blames her <unk> on her glee club participation , Sue <unk> her resolve to destroy the club , planning to sabotage Will 's personal life . 
