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CourtCast: Follow today's US Open action

Roger Federer easily handled Leonardo Mayer in the opening round of the US Open, winning 6-1, 6-2, 6-2 (live on ESPN & WatchESPN).

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Isner happy with quick win (0:56)
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9hMichael Beattie

Nadal tips teenage talent for major success

The US Open had its highest number of teenagers in the first round for 25 years and Rafael Nadal is optimistic a Grand Slam champion could be among them.

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21 major titles in 19 seconds (0:19)
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Fognini flips out at chair ump (1:43)
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Digital Serve: The return of Nick Kyrgios (2:03)
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Serena on US Open: 'I don't feel pressure to win here' (3:21)
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Big Four talk Serena's chances of calendar Grand Slam (0:44)
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6dESPN.com

True or false: Kyrgios is bad for tennis

Will Nick Kyrgios ever grow up? Are Rafael Nadal's best days behind him? Pam Shriver gives her thoughts on the top storylines heading into the US Open.

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ATP imposes conditional fine, ban for Kyrgios

Nick Kyrgios was conditionally suspended for 28 days from any ATP-sanctioned event and fined an additional $25,000 for his comments about Stan Wawrinka at the Rogers Cup on Aug. 12.

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Chris McKendry @CMCKENDRY_ESPN

8 retirements in men's 1st round is new US Open (Open Era) record. Hot, humid conditions expected to continue for at least 2 more days.

ESPNTennis @ESPNTennis

And we have our 8th retirement of the tournament. Kokkinakis is out after trailing 0-2 in the 5th set. Gasquet advances to the 2R. #USOpen

Young can finally call it a comeback

Donald Young came back from a two-set deficit to defeat No. 11-seed Gilles Simon in the first round at the US Open. Young was 0-17 when down two sets before today.

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Caroline Wozniacki tops Loeb at US Open

The fourth-seeded Dane, last year's runner-up, beat NCAA champion Jamie Loeb 6-2, 6-0. Wozniacki steered clear of upsets that have gotten some of the other top women, 10 of the 32 seeds were eliminated before the second round.

AP

Watch: Roger Federer's first round

The 2-seed will face Argentina's Leonardo Mayer in the first round of the US Open at Arthur Ashe Stadium. The two have met just once before, when Fed beat Mayer in straight sets at the Shanghai Masters in 2014. Live on ESPN, WatchESPN

Wozniacki cruises into second round

Caroline Wozniacki dropped just two games in her first round match against Jamie Loeb, winning 6-2, 6-0. Wozniacki had just 10 unforced errors in the match. US Open live on ESPN, WatchESPN

AP

21 major titles in 19 seconds

Gatorade commissioned artists from around the world to create 21 pieces of art celebrating each of Serena Williams' major wins. Titled "Serena 21," watch it all come together in 19 seconds.

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ESPNTennis @ESPNTennis

Donald Young has never come back from 0-2 down in Majors (0-15). But he has the chance now! The American pushes No.11 seed Simon to 5th set.

Wozniacki takes first set over Loeb

Caroline Wozniacki beat Jamie Loeb 6-2 in the first round of the US Open. Loeb had 17 unforced errors to Wozniacki's 7. Watch on ESPN/WatchESPN

AP

Watch live: Wozniacki vs. Loeb

Two-time US Open finalist Caroline Wozniacki takes on former NCAA champion Jamie Loeb. Live on WatchESPN

AP Photo/Tim Ireland