Australian Open: Top seed Nadal retires hurt in fifth set, Cilic reaches semi-final

Marin Cilic advanced to the semi-finals of the Australian Open on Tuesday after top seed Rafa Nadal retired hurt when trailing 3-6 6-3 6-7(5) 6-2 2-0 in their match at Rod Laver Arena.

Nadal took a medical time-out late in the fourth set for treatment on an apparent hip injury and was clearly struggling as he battled on in the evening match. After being broken to fall behind 2-0 in the fifth, Nadal called it quits, and shook hands ruefully with the chair umpire and Cilic. Sixth seed Cilic will meet Briton Kyle Edmund for a place in the final.

"Really unfortunate for Rafa. He is an unbelievable competitor. Always gives his best and it's very unfortunate for him to finish this way. "

- @Cilic_Marin will play @Kyle8Edmund in the SF. Kudos to the  on a superb performance nonetheless. #AusOpen pic.twitter.com/rMFIW9Wl4a

— #AusOpen (@AustralianOpen) January 23, 2018

Unfortunate scenes here with the world No.1 Rafael #Nadal retiring hurt in the QF @Cilic_Marin progresses through to the SF. #AusOpen pic.twitter.com/IEjPruzvdi

— #AusOpen (@AustralianOpen) January 23, 2018