Rafael Nadal refused to retire from his second-round match at the Australian Open despite suffering a hip injury in his shock defeat.
The reigning champion and top seed in Melbourne crashed out on Wednesday, going down 6-4 6-4 7-5 to world number 65 Mackenzie McDonald.
Nadal started sloppily in the first set and then pulled up with an apparent upper leg issue after chasing a forehand at 4-3 down in the second, and his movement was clearly hampered from that point on.
The 36-year-old confirmed he aggravated an issue he had been suffering with for a "couple of days" prior to his meeting with McDonald.
Nadal could well have handed McDonald a walkover, but explained that as defending champion, he did not want to go out without a fight.
"I considered all the time stopping, but I didn't ask," he said in a press conference. "I have to know myself, and I tried to keep playing without increasing the damage.
"I was not able to hit the backhand at all. I was not able to run for the ball. But I just wanted to finish the match. That's it.
"I didn't ask them [his team]. I am old enough to take my own decisions. I didn't want to retire, [as] defending champion here. No, I didn't want to leave the court with a retirement.
"It's better like this. I lost. Nothing to say. Congratulations to the opponent. Just try your best till the end, it doesn't matter the chances that you have.
"That's the philosophy of the sport. That's the essence of the sport by itself. I tried to follow that during all my tennis career, and I tried of course to not increase the damage, because I didn't know what's going on."
Nadal, who is the first top seed to go out in the second round of the Australian Open since Gustavo Kuerten in 2001, is unsure as to the extent of his injury.
"I don't know what's going on, if it's a muscle, if it's a joint. I have history in the hip, I had issues. I had to do treatments in the past," he said.
"Now I feel I cannot move. But I don't know till I do the test and all this stuff, I don't know. I don't know.
"I'm tired of talking about it. I understand, but I lost the match. That's it. I tried until the end. I don't know if in good condition I would win the match. I will have better chances without a doubt."
Nadal added that he would be "lying" if he said he had been mentally destroyed by the issue, given the comfort of his life outside tennis.
However, the 22-time grand slam champion is still motivated to return to the court.
"It's a very simple thing: I like what I do. I like playing tennis," he added.
"I know it's not forever. I like to feel competitive. I like to fight for the things that I have been fighting for almost half of my life or even more.
"It's not that complicated to understand, no? When you like to do one thing, sacrifices always make sense. When you do things that you like to do, at the end of the day, it's not a sacrifice. You are doing the things that you want to do. Sacrifice is when you are doing things that you don't want to do."
The Spaniard conceded another long spell away from the court would be difficult, though.
He said: "Of course it's tiring and frustrating to spend a lot of [this] part of my career recovering and trying to fight against all this stuff all the time.
"I have had seven months playing almost nothing, and then if I have to spend a long time again, then it's super difficult in the end to be in rhythm and to be competitive and to be ready for the fight. Let's see how the injury is, and then let's see how I can manage to follow the calendar."
Swiatek seals Italian Open hat-trick after soaring past Sabalenka
Iga Swiatek stormed to her third Italian Open title following a dominant 6-2 6-3 victory over Aryna Sabalenka.
The world number one took just under an hour-and-a-half to deny the world number two, and complete a hat-trick of triumphs in Rome.
The pair were contesting a second final in as many events, with Swiatek saving three championship points before eventually prevailing in the Madrid Open showpiece a fortnight ago.
However, it was one-way traffic this time around. The Pole converted two out of three break points as she controlled the opening set.
Sabalenka was the last player to deny Swiatek in a WTA final, that coming at last year's Madrid Open.
Although, the second seed was helpless as her opponent broke again in game seven of the second set, before wrapping up a fourth title of the season ahead of the French Open later this month.
Data debrief
Landing her third Italian Open title before turning 23, Swiatek is only the second player to achieve that feat after Gabriela Sabatini.
In fact, at 22 years and 352 days old, she is the youngest player to win 10 WTA 1000 titles since the introduction of the format in 2009.
The Pole also became the third player to triumph in Madrid and Rome during the same season, after Dinara Safina (2009) and Serena Williams (2013).
Jarry defeats Paul to set up Zverev showdown in Italian Open final
Nicolas Jarry defeated Tommy Paul in three sets on Friday to set up a showdown with Alexander Zverev in the Italian Open final.
The men's world number 24 prevailed 6-3 6-7 (3-7) 6-3 in a little under three hours in Rome to reach his first ATP Masters 1000 final.
Jarry earned the only break of serve in the eighth game of the opening set, but Paul - who dropped just one set in four matches en route to this stage - hit back in the second.
Birthday boy Paul lost serve to trail 4-2 at one stage, but he produced one of the shots of the tournament at the ideal moment and soon dragged it back to 4-4.
A gruelling set concluded with Paul taking the tie-break 7-3, but Jarry was unperturbed and won the deciding set with his fifth match point to see off Paul in a gruelling contest.
Data Debrief:
Jarry is the third male Chilean in the Open Era to reach the singles final of the Italian Open after Marcelo Rios (1997-98) and Fernando Gonzalez (2007).
The 28-year-old registered 13 aces against Paul to his opponent's seven and hit 35 winners to 19 in a deserved victory.
Zverev ends Tabilo's dream run to reach Italian Open final
Alexander Zverev fought back from the brink to reach the Italian Open final on Friday, overcoming Alejandro Tabilo by a 1-6 7-6 (7-4) 6-2 scoreline in the last four.
Zverev was punished for a slow start as Tabilo took the opener within 32 minutes, but the German fought back in a one-hour, 15-minute slog of a second set.
The 2017 Italian Open champion put his foot down from 3-3 in the second-set tie-break, with Tabilo potentially feeling the effects of a fine run that included a last-32 upset of Novak Djokovic.
Zverev upped the intensity in the final set and won a huge 94 per cent of points behind his first serve as his opponent wilted, the third seed reaching the Rome final for a third time.
Data Debrief: Zverev draws level with Becker
Zverev will now face either Nicolas Jarry or Tommy Paul in Sunday's final, which will be his 11th at ATP 1000 Masters level.
That tally pulls him level with Boris Becker for most such finals by a German player since the format's 1990 introduction.
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