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The 21-year-old hit 156 aces on his way to his first career ATP title. 

Osaka won for Breakthrough of the Year, and Djokovic was honored as Sportsman of the Year.

With his elbow injury, Djokovic changed his serve; he's since forsaken that move.

The 32-year-old defeated Stan Wawrinka to win his 8th career title, in Rotterdam. 

She will get to share her thoughts on the film, A Star Is Born. 

The 21-year-old built up some courage to post a funny Tweet at his expense.

The former world No. 1 hit the streets with major celebrities and fashion icons.

In honor of Black History Month, we take a look at five players who transformed the sport.

Voice your thoughts on Osaka's chances after splitting with her coach.

John Isner wowed with a career-high first-serve percentage of 92 on Friday.

Victoria Azarenka and Serena Williams squared off in the championship match.

The Frenchman's been on fire at the ATP 500-level tournament.

From Doha to New York and everywhere in between, players served their best looks.

The unseeded Belgian will play Simona Halep for the Doha title.