World number three Dominic Thiem survived a third set wobble and had to save three set points to beat American Jack Sock at the 2020 French Open.
The US Open champion needed just 25 minutes to break Sock three times and storm through the first set 6-1.
The third-seed, beaten by 19-times Grand Slam champion Rafael Nadal in the last two finals in Paris, was brimming with confidence after winning his first major at the US Open earlier this month.
Sock, whose injury-hit 2019 saw him tumble down the rankings to his current 310, tried to mix it up in the second set, hitting several superb drop shots to make it more of a battle.
Highlights: Thiem breezes past Sock to reach third round
But he was ultimately helpless against Thiem's baseline power and far superior fitness, losing the second 6-3.
"I'm very happy," Thiem said in his on-court interview. "I messed it up a bit in the third set, up 4-3 and 40-15."
"I found myself in the tie-break and he played very well, particularly in the second and third sets. I was lucky to save the three set points in the tie-break."
Thiem, however, lost his focus in the third, was broken twice and spilled more than twice as many unforced errors than in the two previous sets combined, allowing Sock two breaks to lead 5-4 and 6-5.
The Austrian, trailing 6-3 in the tie-break, saved three set points and finished the game seconds later with the first chance.
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Additional reporting from Reuters