MELBOURNE, Australia (AP) More than 13 years after Andy Roddick won the 2003 U.S. Open, the last time an American man triumphed at a Grand Slam, the future of U.S. men's tennis appears bright.
The next generation of young players, all aged between 18 and 20, is starting to emerge and showing enough promise at this year's Australian Open to suggest they may be on the cusp of a breakthrough.
Seven made the main draw at Melbourne Park and three were still in contention after the first round.
Frances Tiafoe, who turns 19 on Friday, defeated Mikhail Kukushkin 6-1, 6-7 (3), 6-3, 6-2 on Tuesday, while 20-year-old Ernesto Escobedo beat Daniil Medvedev 7-5, 4-6, 7-6 (5), 6-1. They joined 20-year-old Noah Rubin, who won his opener a day earlier to set up a second-round match against Roger Federer.
The others failed to advance, but not before serving notice to the tour's old guard.
Reilly Opelka, 19, lost a tight five-setter to 11th-seeded David Goffin, while Jared Donaldson, 20, lost to Brazil's Rogerio Dutra Silva after leading two sets to none. Taylor Fritz and Michael Mmoh, both 19, each put up good fights in defeats to veterans Gilles Muller and Gilles Simon, respectively.
''We're all really supportive of each other and happy to see all of us doing so well,'' Tiafoe said. ''Hopefully we can keep going and not stop now.''
Much has been expected of Tiafoe, the son of immigrants from Sierra Leone, since he won the Orange Bowl at age 15, the youngest champion in the prestigious 18-and-under tournament's history.
Tiafoe just missed out on a career-defining win at last year's U.S. Open, where as a wild card, he led the long-time top-ranked U.S. player, John Isner, by two sets to none before the match slipped away. It was a heartbreaking loss, but one Tiafoe learned from.
''I was like, the next opportunity I'm definitely going to take it,'' he said after his first-round win on Tuesday, flashing a wide grin. ''Now, getting through relatively comfortable today means a lot. ... I really feel like I belong now.''
He next plays another 19-year-old, his close friend, Alexander Zverev of Germany.
Both Opelka and Donaldson, meanwhile, got their own tastes of Grand Slam agony in Melbourne.
Opelka, a 6-foot-11 (2.11 meter) former Wimbledon junior champion with a booming serve and whip-like forehand, had two break points to go up 4-2 in the fifth set against Goffin, but couldn't convert either and ultimately lost 6-4, 4-6, 6-2, 4-6, 6-4.
Opelka had never before played a five-set match and was making his debut in the singles main draw of a Grand Slam. Yet he showed grit - and no hint of nerves - deep into the fifth set against a seasoned pro like Goffin, even as he started to cramp and struggled to move.
''I've played some guys in the top 10 before so I wasn't uncomfortable,'' he said. ''With the way I play, hopefully it really shouldn't matter who's on the other side of the net.''
Donaldson's loss was less expected. The Rhode Island native made a stunning run to the third round of last year's U.S. Open, upsetting the 12th-seeded Goffin and Viktor Troicki, a former top-20 player.
And he was well on his way to a commanding win over Dutra Silva before the Brazilian stormed back for a 3-6, 0-6, 6-1, 6-4, 6-4 victory.
''Losses like this really define your character,'' he said. ''So I can be upset and sulk about it or I can get back on the practice court and keep working hard and get better so matches like that don't happen again.''