Andy Murray has been pushed to his limits in the first two rounds at Roland Garros, and the world number two has been unable to pinpoint a reason as to why that is.
Murray battled past Radek Stepanek 3-6, 3-6, 6-0, 6-3, 7-5 in the first round before finding himself in another five-set duel with French wildcard Mathias Bourgue, who he he eventually downed 6-2, 2-6, 4-6, 6-2, 6-3 on Wednesday.
In his match against Bourgue, Murray got off to a superb start and looked on course for a quick victory, but matters started to go downhill and he was once again forced to stage a late comeback.
"I just lost my way," Murray told BBC Sport. "Mathias was excellent and made me run a lot. He's got a fantastic future for sure.
"I led 6-2 2-0 then he started playing unbelievably and I was finding it hard to win points, let alone games. I've played matches like this before and just tried to fight through to the end.
"You can't play too many matches like this if you want to go far in this tournament. I hope to win the next one a little bit faster."
Murray, who committed 45 unforced errors during the match, will face 27th seed Ivo Karlovic in the third round.
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