Former champ Wawrinka knocked out in Paris

Former champion Stan Wawrinka was knocked out of the French Open in the first round when he lost 6-2 3-6 4-6 7-6 (7-5) 6-3 to Spain's Guillermo Garcia-Lopez.

The Swiss, who lifted the Musketeers Cup in 2015, led two sets to one but faded away after losing the fourth-set tiebreak.

Wawrinka, seeded 23rd in Paris, has been clawing his way back to the top after undergoing two knee surgeries last year.

Elsewhere, rising Greek teen Stefanos Tsitsipas advanced at the expense of Carlos Taberner in four sets, while there were also wins for Benoit Paire, Karen Khachanov and Dusan Lajovic.

British No.3 Cameron Norrie was leading 6-1 2-0 when first-round opponent Peter Gojowczyk retired injured.

Nevertheless, Norrie had looked assured and in complete control before Gojowczyk, the world No.43 from Germany, called it quits.

"I didn't see it coming, not at all," said Norrie. "He was hitting the ball big and hitting well. It didn't look like anything was bothering him too much.

"But I think start of the second set on his serve and then a little bit on his movement, I wrong-footed him a couple times.

"I was playing great. I was serving really well. I think that that was the best tennis I have played in my life. I think I was in the zone and not making any unforced errors, being the one dictating play."