Jamie Murray answers your Wimbledon questions

Jamie Murray answers your Wimbledon questionsByKatharine SharpeBBC Sport senior journalistPublished2 minutes agoSometimes it's best to have your Wimbledon questions answered by those who know the famous courts inside out.So we put some of your questions on playing at the All England Club to former mixed doubles champion Jamie Murray.Get in touchSend us your questionsContact formContact formImage source, Getty ImagesImage caption, Jamie Murray won the Wimbledon's mixed doubles title in 2007 with Jelena Jankovic and in 2017 with Martina HingisQuestion: What is the maximum size of a tennis racquet? James in Dorset and David in LlanwnogJamie: Most standard tennis racquets are 27 inches in length. Some players play with longer ones, so a quarter or a half-inch more. The most you are allowed is 29 inches, but I don't know anyone who gets near that!Question: Does the heat affect the tennis balls? Richard in PurleyJamie: I think it does, yes. It makes them travel faster through the air and they probably will be livelier off the bounce, because the surface will be reactive. It definitely helps them to fly quicker through the air when it's hot.Question: What are the players looking for when checking tennis balls at each serve? Margaret in KentJamie: All players will take three or four balls to choose from before serving. The reason they do that is they are trying to find the newest, smoothest ball, because it will fly quicker through the air, which will help them with their serve and with trying to get more free points.Question: What do the pros do with last year's tennis bag, and are their tennis shoes custom-made? If so, do they get more width around the toes? Gordon in NewcastleJamie: I think most players take their bags home after Grand Slams, and either give them away or they get stored. With shoes, I don't think players get them custom made, I think footwear brands just make standard shoes and hope that the players like them.Question: Jamie...