By Sean Walsh Chelsea head coach Enzo Maresca has played down comparisons between himself and Manchester City manager Pep Guardiola. The Blues take on the Cityzens in Columbus as part of their respective pre-season tours of the USA on Saturday night. Maresca has taken charge of three friendlies since taking the Chelsea job. They were held 2-2 by League One side Wrexham before losing 4-1 to Scottish champions Celtic, though saved face earlier this week with a fine 3-0 triumph against Mexican giants Club America. At his pre-match press conference, Maresca, who previously worked under Guardiola a…