Roger Federer considered retirement following his second surgery on his right knee last month.

Now, the Grand Slam king concedes he's closing in on the career finish line.

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Federer spoke candidly on the R word in an interview with German publication Zeit.

“In principle, I was only concerned with my health, but now I miss the feeling of playing in a full stadium,” Federer told Zeit. “Retirement is getting closer and I will miss tennis so much.

"It would be easier for me to retire now, but I wanna give myself a chance to keep enjoying my time on the court.”

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