Pat Nevin wasn’t impressed by Chelsea’s Raheem Sterling during tonight’s loss against Middlesbrough. The Blues produced a really poor team performance on Tuesday night when travelling to Championship club Middlesbrough. Chelsea suffered a 1-0 away defeat in the first leg of a Carabao Cup semi-final tie. They are fortunate that there’s a second leg in two weeks time at Stamford Bridge. Despite 72 per cent of possession, Mauricio Pochettino’s side struggled at times to break the opposition’s low block. They were wasteful on the few times they did get a chance on goal, too. Speaking via talkSPORT…