Novak Djokovic waits to see how long wrist injury will sideline him

''It happened in two days. Obviously I practiced a lot. Maybe I started a bit too strong,'' he said. ''The transition from hard court to clay, different

Djokovic played his Monte Carlo semifinal vs. Federer with heavy strapping on his right wrist and was unable to serve or return to his usual level :: Mitchell Gunn/Getty Images

''It happened in two days. Obviously I practiced a lot. Maybe I started a bit too strong,'' he said. ''The transition from hard court to clay, different balls, have probably taken its toll.''