The double Olympic champion then went on to claim the second and third sets 7-5 and 6-0 respectively to secure victory over Del Potro, who he beat in the final of Rio 2016. Sports. "And now I know his game a lot, but I need to be in good shape and physically be stronger to hold a long match if we play a long match, long rallies". Most importantly, the Briton kept his second serve safe and he lost his serve just twice, from 9 chances Delpo had.
Del Potro, playing Paris for the first time in five years due to wrist surgery recovery interruptions, failed to take any of the four set points he had in the opening set.
"I definitely feel like I'm capable of winning that match".
He saved a set point at 4-5 and then another in a memorable 10th game, missing a sitter forehand before finally breaking back. "Whoever had won that first set had big momentum", Murray said. Instead of that, Delpo found the way to break back, showing his enormous fighting spirit yet again, leveling at 5-5 and setting up another thrilling finish of the set.
This time Murray made no mistake and took the set with his fourth ace of the match. "I will get better".
In the end, Murray advanced with a score of 7-6 (8), 7-5, 6-0.
With the year's second Grand Slam in progress, another one exactly one month away, and a third to begin in less than three months, Murray is raising his level to the tune an impressive first week at the French Open.
Losing that opener on a disputed linecall cut Del Potro deep.More news: Korea drone photographed US defense site
More news: Sunderland make move for Aberdeen boss Derek McInnes
More news: Trump partially denies Comey's testimony, mum on existence of recordings
The rain, which became increasingly heavy around 5 p.m. local time, affected a total of 10 matches on different courts. "I can run, I can slide", Halep said.
Pablo Cuevas, who was bidding to become the first Uruguayan to reach the round of 16 at a Grand Slam in 18 years, was comfortably beaten 6-2, 6-1, 6-3 by Spain's Fernando Verdasco.
He said: "I felt I was playing well".
The No. 7 seed Marin Cilic secured a last 16 spot in a much more comfortable manner, as he overcame Feliciano Lopez 6-1, 6-3, 6-3 in one hour and 47 minutes. Wozniacki also broke in half of Kuznetsova's 12 service games.
"My return was working extremely well today", said Cilic, who had eight aces.
But Murray looked much more like his old self, using the drop shot particularly well and finding the sort of penetration through the court that has been such an issue in 2017. Cornet won 6-2, 6-1.
In a similar scenario, there was a match Stan Wawrinka, who met with unpredictable Italian Fabio Fognini.
Also in women's action, Simona Halep faced her first seeded opponent of the tournament in Daria Kasatkina, the 26th seed.