Murray prepares for Karlovic clash
Having battled from behind on Court Philippe Chatrier to defeat Radek Stepanek and Mathias Bourgue in five sets, Murray makes his first trip to Court Suzanne Lenglen on Friday for a third-round clash with giant Croatian Ivo Karlovic.
Murray has spent more than twice as long on court as Rafael Nadal in reaching the last 32 and knows his title hopes depend on him saving some energy for the battles to come.
No player in the Open era has won a grand slam having played more than three five-set matches in a single tournament, with the last being Gaston Gaudio here in 2004.
The Argentinian also came through five-set battles in his opening two rounds and then stunned Guillermo Coria from two sets down in the final.
The good news for Murray, who posted a picture of a 'Get out of jail free' card from Monopoly on his Facebook page, is there are unlikely to be too many long rallies against 6ft 11in Karlovic.
The pair have met six times before with Murray winning on each occasion.
The Scot said: "What's hard for players is not necessarily the length of the match, it's the physicality of the points that you play.
"Mahut and Isner, when they played at Wimbledon, they played for however many hours it was, but they're playing two or three-shot rallies. So mentally it's tiring, but physically not so much.
"And normally against Ivo, the sets are very close. He plays a lot of tie-breaks because he's so tough to break. But the points are not physically demanding so right now I'd take that as a positive."
At 37, Karlovic is the oldest man to make the third round of a slam since Jimmy Connors at the US Open in 1991.
''It's the only time when being old is okay,'' he said with a smile.