Chelsea boss Enzo Maresca has warned one player he needs to become far more consistent after his performance in Europe last night. The Blues started their campaign in the Conference League on Thursday evening with a 2-0 home win against Servette. They’re playing the Swiss club in a two-legged play-off tie, so the teams will lock horns again next Thursday for the second leg. For Enzo Maresca, he got his first competitive win under his belt since becoming Chelsea head coach in the summer. Next, his side travel to Wolverhampton Wanderers on Sunday in the Premier League. READ MORE: Enzo Maresca sh…