Watch: Roger Federer performs series of exercises in gym as he steps up rehab

Roger Federer posted a new video on Instagram on Wednesday, showing off a range of exercises aimed towards strengthening the mobility of his legs.

Federer has been undergoing rehabilitation since August last year after a third surgery on his right knee, which has been bothering him since 2020.

The Swiss went under the knife twice in 2020, after which he briefly returned to the tour last year. He played at Roland Garros and made the quarterfinals at Wimbledon but was forced to undergo another surgery a few weeks later.

Now, it seems that the 40-year-old is slowly but steadily returning to full fitness.

In the reel, the 20-time Major champion can be seen performing a series of exercises. He appears to be moving seamlessly, indicating that he does not feel any pain in his knee, which is a good sign.

Federer's reel got over 85,000 likes in under an hour (at the time of writing), with Dominic Thiem also showing his appreciation.

Scores of fans of the Swiss have also made their presence felt in the comments section, with over 1,500 users having replied so far.

"In the middle or end of 2022" - Roger Federer return timeline

The former World No. 1 was asked about his comeback plans during an interview last month. The Swiss revealed that he plans to return to action towards the end of the year.

"I still have to wait a little bit with running," Federer said. "I hope I can increase that more and more over the next few months and hopefully make a comeback in the middle or end of 2022."

He also stressed that opting for a third procedure on his knee was the "right thing" to do as it was becoming difficult to carry on with the pain.

"The surgery was the right thing," he said. "The knee was no longer good after Wimbledon. It couldn't go on like this. I'm fine. I walked on crutches for 2 months and had to start all over again."