The Swiss star was ruled out of the tournaments in Rotterdam and Dubai after he went under the knife to repair a torn meniscus.
However, the 34-year-old, who picked up the injury after his Australian Open semi-final defeat by Novak Djokovic back in January, looks as determined as ever to regain his fitness as quickly as possible.
Federer posted a series of photos of him working on his fitness levels on Instagram and shared a message with his fans on the app.
Federer wrote: “Rarely felt so happy being back on a practice court.”
The 17-times Grand Slam winner will be hoping to be back in competitive action as soon as possible as the build-up towards the French Open in Paris in May begins to gather pace.