NEW YORK, NEW YORK - SEPTEMBER 12: Daniil Medvedev of Russia celebrates with the championship trophy after defeating Novak Djokovic of Serbia to win the Men's Singles final match on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images)
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Daniil Medvedev on stopping Novak Djokovic's calendar grand slam
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International tennis news 16 videos
NEW YORK, NEW YORK - SEPTEMBER 12: Daniil Medvedev of Russia celebrates with the championship trophy after defeating Novak Djokovic of Serbia to win the Men's Singles final match on Day Fourteen of the 2021 US Open at the USTA Billie Jean King National Tennis Center on September 12, 2021 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images)
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CNN  — 

Roger Federer said Novak Djokovic had a “truly exceptional” year, even as the world No. 1 fell short of winning a calendar grand slam at the US Open.

In New York this month, Djokovic was bidding to become the first man since Rod Laver in 1969 to win all four major tournaments in the same calendar year, but lost to Daniil Medvedev in the final.

Federer, who is recovering from knee surgery having last played at Wimbledon in July, added that he thinks achieving a calendar grand slam is still a possibility in the men’s game.