PARIS -- Among the many charms of this sport are those auspicious moments when the future collides violently with the present, when the next generation emphatically announces itself to the reigning establishment.
On the same day Serena and Venus Williams departed from Roland Garros in the second round, an 18-year-old from Chicago -- the youngest player in either main draw -- managed to beat the highest-ranked Frenchwoman on her home court. Whether Taylor Townsend is destined to win Grand Slam singles titles remains to be seen, but the juxtaposition was inescapable.
Back in 1990, a Californian teenager named Pete Sampras beat 30-somethings Ivan Lendl and John McEnroe at the US Open and then Andre Agassi in the final for his first major title. Eleven years later, after Sampras had won seven of eight championships at Wimbledon, he was stunned there by 19-year-old Roger Federer in the fourth round. Federer was the No. 1 player in the world in 2004 when a 17-year-old Spaniard took his breath away in Miami. In time, he would take away more than that.
And so it was that Rafael Nadal, the No. 1-ranked player in the world, met the 20-year-old Austrian Dominic Thiem on Thursday. Historically, Nadal has taken a dim view of generation next. He has never, ever lost to a player born in the 1990s, posting a spotless 20-0 record.
Make that 21-0. The future, apparently, has not arrived quite yet.
At times, Thiem showed some sparkling chops -- and a sweet, swinging one-handed backhand -- but he just didn't have the mental or physical stamina to hang with the man who is looking for his unprecedented fifth consecutive French Open title and ninth overall. The final score was 6-2, 6-2, 6-3, but the kid acquitted himself well.
Thiem, who said he made a lot of "rookie mistakes," did not have any illusions going into the match.
"Yeah," he said, "I expected it, everything that came after. He lost one match here in 10 years or something, so I knew that it's going to be the biggest challenge in my tennis career."
Thiem (pronounced "teem") sometimes swung for the fences; he had 41 unforced errors, 22 more than Nadal. And like a typical 20-year-old, he was underserved; Nadal broke him no fewer than seven times.
Nadal, at his postmatch news conference, called Thiem a "dangerous" player and said he didn't appear afraid of the moment.
"I didn't have that serve at the age of 17," he said, referring to his first visit to the grand stage. "I didn't have the backhand, I didn't have that power. So always is question of keep improving, make the normal evolution, be enough humble to keep practicing as hard as you did before.
"I have almost 28 [years]. [Novak] Djokovic and Andy [Murray] has 27. [Roger] Federer has, I don't know, 32. The new generation, new players, have to come. We're not going to be here for 10 more years."
In 2011, Thiem reached the junior final here as a 17-year-old and won the prestigious Orange Bowl.