Rafael Nadal raises clay-court concerns after battling Madrid Open win
Rafael Nadal admitted he needed to "learn" to play on clay again following first match back after a six-week injury layoff, in which he defeated Miomir Kecmanovic 6-1 7-6(4). The world No 4 suffered a stress fracture in his rib but was still finding his feet on the surface again after playing fewer matches on the dirt in recent years.


