Four months after his left wrist injury, Juan Martin Del Potro is already practicing his serve and forehand.

The Argentine, who hasn't played since Miami when he lost to Vasek Pospiil in three sets, is believed to be finally stepping out of his injury days and he has revealed that he is looking forward to an injury free season.

Del Potro is as motivated as ever and wrote about his recovery process one month go. The World No.

581, who was fourth in 2010, played only four matches this year: one in Miami and three in Sydney on January. He assured that will play US Open next year.