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Jannik Sinner d. Novak Djokovic 6-4, 7-5, 7-6(3), Roland Garros semifinals

The final, official changing of the men’s guard: The 38-year-old legend threw everything he had at the 23-year-old heir apparent, and for once it didn’t work.

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Learner Tien d. Daniil Medvedev, 6-3, 7-6(4), 6-7(8), 1-6, 7-6(7), Australian Open second round

The American teen announced his presence with this marathon shocker, and showed off the methodical grit that would take him into the Top 30 by year’s end.

Learner Tien delivers hilarious interview after late-night upset over Daniil Medvedev at Australian Open

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Ben Shelton d. Karen Khachanov, 7-6 (5), 4-6, 7-6 (3), National Bank Open final

Shelton’s breakthrough season peaked with his first Masters 1000 title, in an intensely fought final. He was a player, not just an athlete, now.

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Alex de Minaur d. Alejandro Davidovich Fokina, 7-5, 1-6, 7-6 (3), Citi Open final

The Australian was twice a winner: First he saved three match points by the skin of his teeth, then he walked across the court to console the man he’d just beaten.

Read more: Washington final 'not the end' for Alejandro Davidovich Fokina, says Alex de Minaur

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Grigor Dimitrov d. Gael Monfils, 7-6(4), 4-6, 7-6(2), Indian Wells third round

Fourteen years after their first meeting, these two veteran crowd favorites gave Indian Wells fans three hours of stylish, athletic, back-and-forth fun. You don’t need to teach olds dogs new tricks when they already know as many as these two.