Chelsea boss Enzo Maresca has just admitted that one of his players is quite clearly trailing the rest of his squad in terms of fitness after watching his performance in pre-season. Chelsea put in their best display of the pre-season tour so far on Thursday to beat Club America 3-0 in the friendly match. Christopher Nkunku, Marc Guiu and Noni Madueke were all on the scoresheet during a contest where there were plenty of positives to leave with. There were unofficial debuts for both Kiernan Dewsbury-Hall and Filip Jorgensen for the fans to enjoy. On top of that, the Blues attack showed a lot of…