New Chelsea boss Enzo Maresca issues concerning warning after Wrexham struggle
![New Chelsea boss Enzo Maresca issues concerning warning after Wrexham struggle](https://i2-prod.mirror.co.uk/incoming/article33321325.ece/ALTERNATES/s615/0_GettyImages-2163538750.jpg)
Chelsea's pre-season campaign started with a draw against Wrexham at Levi's Stadium in California as Christopher Nkunku and Lesley Ugochukwu scored in Enzo Maresca's first match