Zverev, just 20 and fresh from his sensational Rome Masters demolition of Novak Djokovic, slumped to a 6-4, 3-6, 6-4, 6-2 defeat to Spain's Fernando Verdasco, 13 years his senior.

"I played absolute shit, that's why I lost," said Zverev bluntly.

"But life goes on, it's not a tragedy. In Rome I played fantastic, I won the tournament. Here I played bad, I lost first round. That's the way it goes."

In a match controversially suspended on Monday at one set each, Zverev was defeated in a fog of mistakes and despondency.

The beanpole German committed 50 unforced errors and drew jeers from the Philippe Chatrier court crowd when he took out his frustration by hammering his racquet into the clay.

Left-handed Verdasco, playing his 14th Roland Garros and 56th consecutive major, had lost to Zverev in the first round on clay in Madrid earlier this year.

But he is an experienced Grand Slam competitor, making the last 16 in Paris on five occasions.

"I practised really hard before this match against a great player like Alexander and I am super happy to be here on this court," said Verdasco who next plays France's Pierre-Hugues Herbert.

"Maybe it was my experience. You have to be ready emotionally and physically because it can be a long match."

Murray, the 2016 runner-up to Djokovic, shrugged off a second set wobble to defeat Russia's Andrey Kuznetsov 6-4, 4-6, 6-2, 6-0.

"He goes for his shots, he plays very aggressively and quite close to the baseline. He hits the ball pretty flat, but it was quite windy today and that can make things difficult when you try to play that way," said Murray, who showed few effects of the fever he carried into the event.

- Handshake snub -                 

Top seed Murray will play Martin Klizan of Slovakia who was accused a faking an injury in his five-set win over French wildcard Laurent Lokoli.

Lokoli was so angry at Klizan's actions on court that he refused to shake hands with his opponent.

Third seed and 2015 champion Wawrinka was an easy winner, defeating Slovakian qualifier Jozef Kovalik 6-2, 7-6 (8/6), 6-3.

Wawrinka saved two set points in the second set tiebreaker before going on to down the 152nd-ranked qualifier.

Juan Martin del Potro marked his return to the French Open after an absence of five years by defeating Argentine compatriot Guido Pella 6-2, 6-1, 6-4.

"I love to be playing this tournament again after five years," said 2009 US Open champion Del Potro, who reached the quarter-finals in his last appearance in Paris before blowing a two-set lead against Roger Federer.

Japanese eighth seed Kei Nishikori was also a first round winner, beating unranked Thanasi Kokkinakis of Australia 4-6, 6-1, 6-4, 6-4.

Taiwan's Hsieh Su-Wei, the world number 109, stunned seventh seed Johanna Konta 1-6, 7-6 (7/2), 6-4.

Konta is the second top 10 woman to lose in the first three days after world number one Angelique Kerber was also dumped out in the first round.

"I tried very hard and gave myself a big chance. Every time I tried to run as fast as I can and get the ball back," said Hsieh, who won for the just the second time in seven trips to Roland Garros.

Konta has yet to win one match in the main draw in three attempts.

There were no such problems for fifth-seeded Rome champion Elina Svitolina as the 2015 quarter-finalist defeated Yaroslava Shvedova of Kazakhstan 6-4, 6-3.

Later Tuesday, 2014 runner-up Simona Halep, seeded three, faces Jana Cepelova of Slovakia whose only two wins at the tournament came four years ago.

French Open results on Tuesday, the 3rd day of the 2017 tournament at Roland Garros:

1st rd
                  
Martin Klizan (SVK) bt Laurent Lokoli (FRA) 7-6 (7/4), 6-3, 4-6, 0-6, 6-4
Nicolas Almagro (ESP) bt Marcos Baghdatis (CYP) 6-7 (3/7), 6-4, 6-3, 7-6 (7/1)
Juan Martín Del Potro (ARG x29) bt Guido Pella (ARG) 6-2, 6-1, 6-4
Karen Khachanov (RUS) bt Nicolás Jarry (CHI) 6-4, 3-6, 7-6 (7/4), 6-1
Fernando Verdasco (ESP) bt Alexander Zverev (GER x9) 6-4, 3-6, 6-4, 6-2
Hyeon Chung (KOR) bt Sam Querrey (USA x27) 6-4, 3-6, 6-3, 6-3
Denis Istomin (UZB) bt Ernesto Escobedo (USA) 7-6 (7/3), 6-3, 6-4
Jérémy Chardy (FRA) bt Radu Albot (MDA) 6-2, 6-4, 7-6 (7/3)
Kei Nishikori (JPN x8) bt Thanasi Kokkinakis (AUS) 4-6, 6-1, 6-4, 6-4
Stan Wawrinka (SUI x3) bt Jozef Kovalík (SVK) 6-2, 7-6 (8/6), 6-3
Aleksandr Dolgopolov (UKR) bt Carlos Berlocq (ARG) 7-5, 6-3, 6-4
Kevin Anderson (RSA) bt Malek Jaziri (TUN) 7-6 (7/4), 6-3, 7-6 (7/4)
Nick Kyrgios (AUS x18) bt Philipp Kohlschreiber (GER) 6-3, 7-6 (7/4), 6-3