Andy Murray says he is doing himself "justice" at major events and believes he can still "do some damage" following his Australian Open exit.
Murray finished his second-round match at 4am on Friday and was back playing at Melbourne Park 39 hours later to face the Spanish 24th seed.
"I can have a deeper run than the third round, there's no question," he said.
"I'm competing against a guy ranked 20 in the world and it's still very tight considering the circumstances."
Murray, ranked 66th in the world, needed five hours and 45 minutes to beat Australia's Thanasi Kokkinakis in a thrilling match ending in the early hours of Friday.