Top-10 seeds Alexander Zverev and Juan Martin del Potro have both battled through scrappy matches to make the second round of the French Open.
Zverev overcame Australian John Millman 7-6 (7-4) 6-3 2-6 6-7 (5-7) 6-3 in a marathon clash, while eighth-seeded Argentine del Potro made a sluggish start, but found his rhythm to beat Chilean Nicolas Jarry 3-6 6-2 6-1 6-4.
The pair joined a host of other players, including Russian 10th seed Karan Khachanov, Australian Jordan Thompson, Frenchman Lucas Pouille, Italian Fabio Fognini and British number one Kyle Edmund, who progressed to the third round at the Roland Garros on day three.
Zverev, who threw a spectacular tantrum during his 4h 8m clash with Millman, later called out critics of his patchy form this season.
"Everybody keeps on saying I had a tough year," said the German, who won his first title of the year in Geneva last week. "I mean, I'm still number five in the world.
"Any of you guys know what I am on the Race to London? I'm top 10, so it's not that bad, to be honest.
"Somebody having a tough year is probably outside of the top 50 or something like that. I'm still top 10 of the race, so that's what matters."
Del Potro, playing for the first time since fracturing his right kneecap, was thankful to be on court again.
"I think I'm playing well at the moment, but my main goal is still the knee, my health," he said.
"And I'm looking forward to being 100 percent in the second part of the year, trying to change my goals on tour, and if I get that, I will be happy.
Meanwhile, Russian ace Khachanov eased past Cedrik-Marcel Stebe 6-1 6-1 6-4 and Frenchman Pouille defeated Simone Bolelli 6-3 6-4 7-5.
Fognini beat compatriot and doubles partner Andreas Seppi 6-3 6-0 3-6 6-3, while Britain's Edmund completed a 7-6(1) 5-7 6-4 4-6 7-5 victory over Frenchman Jeremy Chardy.
Australian Bernard Tomic, jeered by the crowd after seemingly refusing to play during a brief drizzle, lost his opening round clash to Taylor Fritz 6-1 6-4 6-1.
Thompson beat lucky loser Alejandro Davidovich Fokina 6-3 6-2 7-6(3) to set up a second-round clash with record-breaker Ivo Karlovic.
The Croatian, who turned 40 in February, beat Feliciano Lopez 7-6(4) 7-5 6-7(9) 7-5 to become the oldest player to win at the Slam in 45 years.
Karlovic also becomes the oldest player to win at any Grand Slam since Australian Ken Rosewall, 44, at the 1978 Australian Open.
Men's draw - Round one:
14-Gael Monfils (FRA) bt Taro Daniel (JPN) 6-0 6-4 6-1
Adrian Mannarino (FRA) bt Q-Stefano Travaglia (ITA) 6-7(5) 6-3 3-6 6-2 6-2
WC-Antoine Hoang (FRA) bt Damir Dzumhur (BIH) 6-4 0-6 7-6(5) 6-3
Martin Klizan (SVK) bt Mikhail Kukushkin (KAZ) 3-6 5-7 6-4 6-2 6-3
WC-Gregoire Barrere (FRA) bt Matthew Ebden (AUS) 6-3 5-7 7-5 6-1
23-Fernando Verdasco (ESP) bt Daniel Evans (GBR) 6-3 6-7(4) 6-3 6-2
22-Lucas Pouille (FRA) bt Q-Simone Bolelli (ITA) 6-3 6-4 7-5
10-Karen Khachanov (RUS) bt Cedrik-Marcel Stebe (GER) 6-1 6-1 6-4
Jordan Thompson (AUS) bt LL-Alejandro Davidovich (ESP) 6-3 6-2 7-6(3)
Ivo Karlovic (CRO) bt Feliciano Lopez (ESP) 7-6(4) 7-5 6-7(7) 7-5
5-Alexander Zverev (GER) bt John Millman (AUS) 7-6(4) 6-3 2-6 6-7(5) 6-3
18-Roberto Bautista (ESP) bt Steve Johnson (USA) 6-3 6-4 6-2
30-Dusan Lajovic (SRB) bt Q-Thiago Monteiro (BRA) 6-3 6-4 6-4
Yoshihito Nishioka (JPN) bt Mackenzie McDonald (USA) 6-7(7) 6-0 4-6 6-2 6-3
Federico Delbonis (ARG) bt Q-Guillermo Garcia-Lopez (ESP) 6-1 3-6 6-3 6-2
9-Fabio Fognini (ITA) bt Andreas Seppi (ITA) 6-3 6-0 3-6 6-3
8-Juan Martin del Potro (ARG) bt Nicolas Jarry (CHI) 3-6 6-2 6-1 6-4
Q-Mikael Ymer (SWE) bt Q-Blaz Rola (SLO) 6-0 6-3 7-6(5)
28-Kyle Edmund (GBR) bt Jeremy Chardy (FRA) 7-6(1) 5-7 6-4 4-6 7-5
Q-Elliot Benchetrit (FRA) bt Cameron Norrie (GBR) 6-3 6-0 6-2
Taylor Fritz (USA) bt Bernard Tomic (AUS) 6-1 6-4 6-1
Reuters.
