Andy Murray casts doubt over his participation at Aegon Championships at Queen's as he recovers from injury Murray said the problem had blown up during his clay-court training block with coach Ivan Lendl after the Monte Carlo Masters. It was then further aggravated by his first match in Madrid, where he beat the unorthodox German Florian Mayer in two long sets. "There were a lot of low balls, high balls, twisting and turning," Murray said in an interview with ESPN. I woke up the day after that match [against Mayer] not feeling great. It just got progressively a bit worse. Missing the French was one of the hardest decisions I've had to take - although it was the right one and really the only one that I could make. After pulling out of the Rome Masters midway through his opening match against Marcel Granollers, Murray did nothing but rest for eight days before returning to the court late last week. He is now undergoing three hours" worth of treatment and rehab every day. And although he is hitting balls again, his sessions are of the lowest possible intensity. "I was told to build up my practice slowly," he said. I've hit some balls the last couple of days but I haven't been doing any movement on the court. I practised for 15 minutes the first day, 20 minutes the second day. Murray had his back scanned last week and consulted several specialists, both in the UK and the USA. The injury is understood to affect a nerve which sends pain shooting down his leg, which is why he can often be seen clutching at his hip, particularly after playing a high ball on his backhand side. "I am hoping that Wimbledon will be fine," he said, "and I'll try to get myself fit and ready to play at Queen's. But I'll just have to wait and see what happens. It's very easy standing in the middle of the court having a controlled practice session for 30 minutes. It's a completely different thing playing for four hours against the best players in the world. So I've got a long way to go.