Marin Cilic through to semi-finals of the Australian Open after top seed Rafa Nadal retires injured when trailing 3-6 6-3 6-7 (5-7) 6-2 2-0. He will play Britain's Kyle Edmund for a place in Sunday's final. Join our live blog for updates: https://t.co/PwmTZNKQO5 #AusOpen pic.twitter.com/JArYO66eeH

— Sky Sports Tennis (@SkySportsTennis) January 23, 2018

@RafaelNadal 😂 #AusOpen pic.twitter.com/dP5W6iQfis

— Akram (@Akram71093) January 23, 2018

Rafael Nadal will retain his #1 ranking, but if Roger Federer wins the #AusOpen he will only be 155 ranking points behind.

— Ben Rothenberg (@BenRothenberg) January 23, 2018

It was tough to watch Nadal hobble off and it's a pity that an encore of the last year's final is ruled out, but Cilic was sensational. #AustralianOpen

— Sambit Bal (@sambitbal) January 23, 2018

I'm sorry Noah but this is a silly comment. #Nadal doesn't "play the injury card". In the 2014 final he completed the match despite a serious back injury. He hates to retire and was visibly angry having to do so tonight. #AusOpen https://t.co/37YIBrAzIz

— Pat Cash (@TheRealPatCash) January 23, 2018

So since @rogerfederer left the court after his last match this has happened; Djokovic, Dimitrov, and Nadal have lost. Has anyone ever been a bigger favorite to win the 🏆with three matches left? @AustralianOpen

— Chris Fowler (@cbfowler) January 23, 2018

Standing ovation for @RafaelNadal as he leaves the court 👏 #AusOpen pic.twitter.com/nK1bwmEjrc

— beIN SPORTS (@beINSPORTS_EN) January 23, 2018

If you think Nadal isn't injured and/or that he is engaging in political theater as though he is trying to create an excuse for losing, I can't help you.

You're being willfully ignorant and wrong. Period.

— Matt Zemek (@mzemek) January 23, 2018

Djokovic, Murray, Stan, Kei, and now Nadal…this schedule kills players. And Roger, well, he managed his schedule great and 20 is in the crosshairs…

— Full Dissident (@hbryant42) January 23, 2018

280 characters isn't nearly enough to go through all of Rafael Nadal's Aussie Open horror stories. Add another to the list, as he retires with a hip injury to Marin Cilic in the 5th set of their quarterfinal https://t.co/iPV4qFT7vJ

— Steve Tignor (@SteveTignor) January 23, 2018

Nadal's only 3rd retirement during the match in 8 years. pic.twitter.com/jvlT4yS4jT

— Ilya Ryvlin (@ryvlin) January 23, 2018

If Federer wins the Australian Open, he will have done so without facing Murray, Djokovic or Nadal. This would be his second major in a row not having faced any of those players.

Last time that happened: 09 French Open + 09 Wimbledon

— Nick Nemeroff (@NNemeroff) January 23, 2018

Rafael Nadal retires for only the second time in 264 grand slam matches. Only previous retirement was vs Andy Murray in quarter-finals of 2010 Australian Open #AusOpen

— Stuart Fraser (@stu_fraser) January 23, 2018

*federer has an impossible draw*
federer fans: he can do it!!!! anything is possible!!!! our man is a champion!!! 🌈
*federer's draw completely opens up*
federer fans: he's gonna lose, he's gonna fuck it all up, this is all over now 😩😩😩

— Maisie (@goderer) January 23, 2018

Murray breaks.
Djokovic breaks.
Nadal breaks.
And Federer still floats.
(*no liability for any mock)

— Adam Peacock (@adampeacock3) January 23, 2018