Watch: Juan Martin del Potro hits the practice court as he steps up recovery from knee injury

Former US Open champion Juan Martin del Potro has begun training again. The Argentine player was recently spotted practicing on a clay court where he looked to be in great touch.

Juan Martin del Potro has not played a professional tennis match for more than two years now. He last played at the 2019 Queen's Club Championships where he, unfortunately, injured his knee. Since then, the Argentine has undergone four knee surgeries.

In some positive news for del Potro fans, the Argentine was recently seen hitting a couple of powerful forehands as well as practicing his backhand.

Juan Martin del Potro on court

Juan Martin del Potro looks determined to return to the court in the upcoming season

Juan Martin del Potro is quite active on Instagram and regularly posts about his daily training sessions. Based on his recent posts, it is evident that the Argentinian is working extremely hard to make a comeback to the sport.

Juan Martin del Potro at Roland Garros 2019

In one of his Instagram posts, del Potro can be seen hitting a perfect forehand.

"Tennis Afternoon," del Potro captioned the post (translated via Google Translate).

In another post, the Argentinian can be seen working out.

"Thursday gym," wrote del Potro (translated via Google Translate).

Despite closing in on full fitness, Juan Martin del Potro has not set a timeline for his return to the ATP tour. However, fans have high expectations and are hopeful he will make a comeback in 2022. Currently ranked 753 in the world, it will be intriguing to see if del Potro can recapture his old form.