Stan Wawrinka happy after enjoying smooth progress into third round

Both men, seeded second and third, came through five-set matches in the opening round and Murray again found himself taken to the wire by French wild card Mathias Bourgue.

Wawrinka had a few hairy moments against Japan's Taro Daniel, notably when he saved two set points in the first-set tie-break, but he did not drop a set and prevailed 7-6 (9/7) 6-3 6-4.

It was Wawrinka's sixth match in a row after he won the title on home soil at the Geneva Open on Saturday.

The top players normally do not compete in the week before a grand slam, but Wawrinka, who battled past Lukas Rosol in round one, feels it has helped his chances.

The Swiss said: "I normally also don't like to play the week before a grand slam. But when they came with the tournament in Geneva, it was something important for me to try to do it. It's a big change in your career when you have a tournament at home.

"I changed a little bit the rest of the schedule to make it the best schedule possible for the French Open, and so far I think I'm feeling good.

"I had a tough first round, winning five sets wasn't easy, but it was really positive because the fight was great. Mentally I was there, also.

"This was a tough three-set match, but I think I did the job I had to do. I'm happy. I think I'm playing better and better.

"For sure I'm not playing my best tennis, but I know I have my best tennis in me."

Bourgue had never played a grand slam match prior to his first-round win and was hugely out of his comfort zone having never before faced a top-50 opponent.

But it certainly did not appear that way as he took advantage of a dramatic dip in form from Murray during the second set, winning eight games in a row and leading by two sets to one before the second seed recovered to win 6-2 2-6 4-6 6-2 6-3.

Bourgue revealed his coach showed him a Muhammad Ali video just before he went on court.

"He said, 'When you box, you want to box in front of a big crowd'. It was very emotional," said Bourgue.

The 22-year-old, rated the 16th best player in France, wowed the crowd with his play and received a standing ovation at the end.

"It was completely incredible," he said. "It was the first time for me on this kind of court, that big, against a huge player. It was really an emotional moment for me, and I will never forget it."

Nick Kyrgios is yet to drop a set at the tournament and needed just an hour and 10 minutes to race past lucky loser Igor Sijsling 6-3 6-2 6-1.

Kyrgios is a player none of the top seeds will want to meet, and in the third round he will renew his rivalry with ninth seed Richard Gasquet.

The Australian announced his talent to the world in 2014 by saving nine match points against Gasquet at Wimbledon before going on to beat Rafael Nadal.

Their meeting last year at SW19 was less positive for Kyrgios, who was booed by the crowd while appearing to throw a game and lost in four sets.

The 21-year-old appeared to have forgotten that part, saying: "I think me and Richard have had some really memorable matches.

"To be honest, some of my favourite matches I've played are against him. Every time we played at Wimbledon it's been a pretty good showdown."

There were straightforward wins for fifth seed Kei Nishikori and eighth seed Milos Raonic while 37-year-old Ivo Karlovic became the oldest player through to the third round of a slam since Jimmy Connors in 1991 after outlasting Australian Jordan Thompson - 15 years his junior - 6-7 (2/7) 6-3 7-6 (7/3) 6-7 (4/7) 12-10.