Which matches come to mind where Murray has had a good first service percentage? I have not seen one in a long time. Wondering if there was a match he didn't have to use his WTA second serve often
Exactly. Tennis Abstract reports his first serve percentage as averaging 63.3% in 2015, compared to 59.7% last year. Last match in their database was v Feddy: 73.8%. Versus Karlovic at Wimbledon it was 73.5%. That isn't what is holding him back at the moment...