MELBOURNE, Australia — If this was it for Andy Murray, if this truly was it, he gave himself — and an appreciative, raucous crowd that included his mother and brother — quite a gutsy goodbye, the type of never-give-in performance he's famous for.

What Murray could not quite do Monday at the Australian Open was finish off a stirring comeback and prolong what might just be the final tournament of his career.

Playing on a surgically repaired right hip so painful that pulling on socks is a chore, he summoned the strength and strokes to erase a big deficit and force a fifth set before eventually succumbing to 22nd-seeded Roberto Bautista Agut 6-4, 6-4, 6-7 (5), 6-7 (4), 6-2, Murray's first opening-round loss at a Grand Slam tournament in 11 years.

"If today was my last match, look, it was a brilliant way to finish," Murray said. "I literally gave everything that I had on the court, fought as best as I could, and performed a lot better than what I should have done with the amount I've been able to practice and train."

Murray, just 31, is a year removed from his operation, and he said that he will decide in the next week or so whether to have a second one. If he opts to avoid another procedure, he might be able to play in July at Wimbledon, where he won two of his three major titles, including the first for a British man in 77 years. If he decides for further surgery, then Monday's match might have been his last.

Even with a hitch in his gait, even as he leaned forward to rest his hands on his knees between points, Murray summoned the strength and the strokes to push the match beyond the 4-hour mark.