The US Open draw ceremony was held Thursday at the USTA Billie Jean King National Tennis Center, with one of the highlights being third seed Roger Federer getting drawn into defending champion Novak Djokovic's half of the draw. But there are plenty of reasons to watch the action from the first match, and ATPTour.com examines five of the first-round matches to watch.
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 Felix Auger-Aliassime vs. Denis Shapovalov
It was unlikely these two #NextGenATP Canadian phenoms would play each other in the first round of the US Open last year. To happen again in 2019 is insane, right? But the sensations will have to once again put aside their friendship to play for a spot in the second round at Flushing Meadows.
When they met here last season, Auger-Aliassime, No. 117 in the ATP Rankings at the time, had qualified, whereas Shapovalov was the 28th seed. Felix was forced to retire during the third set of that match due to a reoccurring heart problem. Auger-Aliassime evened their FedEx ATP Head2Head series with a straight-sets victory this year at the Mutua Madrid Open.
And this time in New York, Auger-Aliassime is the player who enters the match with the momentum. The 19-year-old cracked the Top 20 of the ATP Rankings for the first time this week, and he has won 31 of his 37 tour-level matches this year, making his first three finals in Rio de Janeiro, Lyon and Stuttgart.
“Felix is playing more of a defensive-minded game style, but with the ability to attack, too,” former Canadian great Nestor said about Auger-Aliassime’s game in Montreal. “Denis is more of the aggressive type and the shot-maker. He’s going big and hopefully he gets hot and when he gets hot, he’s a Top 5 player.”
 Stefanos Tsitsipas vs. Andrey Rublev
The two up-and-comers met at last year's Next Gen ATP Finals in Milan, a five-set win for Tsitsipas. But Tsitsipas, Greece's #NextGenATP star, won't be full of confidence ahead of their second FedEx ATP Head2Head meeting.
The No. 8 player in the ATP Rankings is on a three-match losing streak, including opening-round losses at the past two ATP Masters 1000 events in Montreal and Cincinnati, and Tsitsipas didn't make it past the second round at last year's US Open (l. to Medvedev).
Rublev, meanwhile, could hardly have envisioned a better North-American hard-court swing. The