Roger Federer and Rafael Nadal took to social media to congratulate Novak Djokovic on winning his record-extending 10th Australian Open title. Djokovic now owns 22 Grand Slam trophies, tied for most men's singles majors in history alongside Nadal. Federer, who retired at last year's Laver Cup, completed his career with 20 Slams. "Congrats Nole, to you and your team for this great achievement,"...

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