Roger Federer said he never considered retiring last year despite having to undergo two knee operations.
Federer only managed to play the Australian Open and a charity match in Cape Town in 2020 due to injury.
At 39-years-old, that naturally prompted speculation in the media if he would be able to return.
However, as he readies himself to make his comeback on Wednesday in Doha, he says retirement was never on the table.
Federer said: "It's normal to have some discussions with the team and family in a year's time with the question: where to go now?
"After the first surgery, the goal was to be ready for Wimbledon. I wasn't expecting complications, but they did come.
"The knee swelled up when walking or cycling. I didn't understand what was going on because at first the progress was great.
"I was down after the second operation, I questioned everything. Wimbledon was cancelled and the pandemic was severe. But I knew whether I was coming back or not - and that was my goal - I just wanted to get well.
"I didn't want to stop with the Australian Open and the match in Africa. If the knee occupied me for months, it would be clear that the retirement discussions would arise, but not now.
"Now I'm just happy that I've come this far with my team.
"Rehabilitation was normal for me, even if it was difficult, because I want to be healthy. It was a challenge and I like it."
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