Tennis - Former US Open champion Juan Martin del Potro continues to work hard in rehab as he aims to make yet another comeback to the tennis courts. Del Potro underwent knee surgery in January - which was the sixth major surgery he has undergone in his career.
In 2010, he suffered a right wrist injury. In the following years, he suffered three wrist injuries on his left hand. Here is a look at a video that Potro posted on his Twitter account of him working hard in his rehab.