Wimbledon diary: Are players’ trainers chewing up the courts?

Could players’ shoes be responsible for the bare baselines? And Andy Murray reveals Peppa Pig’s role in his preparationsDebate over the state of the courts at the All England Club continues following Bethanie Mattek-Sands’s knee injury on Thursday. One theory hatched at the Guardian diary was the following: could deteriorating conditions at the back of the court have something to do with modern players never playing a shot from anywhere else? We put it to Annabel Croft, someone