By Sean Walsh Chelsea winger Raheem Sterling has thrown his support behind new head coach Enzo Maresca following their disappointing pre-season tour of the USA. The Blues won only one of their five games while Stateside. They beat Club America, but fell to defeats against Celtic, Manchester City and Real Madrid, while they were also held to a draw by League One side Wrexham. During these outings, Chelsea were criticised for their lack of aggression while defending and carelessness when in possession. Maresca was hired to implement a possession-based style of football, following on from Maurici…