Rafael Nadal rages at chair umpire in shock loss at Australian Open

Dominic Thiem has avenged back-to-back French Open final losses to Rafael Nadal, shocking the world No.1 to reach the last four at the Australian Open for the first time.

The Austrian fifth seed gave Nadal a taste of his own medicine at Melbourne Park, out-grinding the Spaniard 7-6 (7-3) 7-6 (7-4) 4-6 7-6 (8-6) in a dogfight that lasted more than four hours.

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On the wrong end of a 4-9 career record, Thiem had never beaten Nadal in a grand slam after finishing runner-up to him in the past two Roland Garros deciders.

Thiem's thrilling five-set loss to the 19-time major champion at the 2018 US Open was still fresh in his mind as he basked in Wednesday night's breakthrough victory over Nadal.

Except this time he felt the rub of the green went his way.

Rafael Nadal and Dominic Thiem embrace after their Australian Open tussle. (Photo by TPN/Getty Images)

"We already had this epic match in New York two years ago," Thiem said.

"Today, I had really good feeling I was lucky in the right situation. (The) net court was really on my side.

"It's necessary because he's obviously one of the greatest of all-time. You need some luck to beat him."

But lady luck could only carry him so far, with Thiem stumbling as he battled mentally to put Nadal away while serving for the match at 5-4 in the fourth set.

"It's a little bit demons in the head," he said.

"Like Roger (Federer) said, it's true. Everybody has it. I was rushing way too much.

"Of course it's very tough to handle if you are up 5-4 against Rafa."

Rafael Nadal had a running battle with the chair umpire. Image: AAP/Getty

Rafa in running battle with chair umpire

With the temperature gauge still reading 31C on Rod Laver Arena when the first ball was struck, it was always going to be a war of attrition.

After losing a gruelling opening set, Nadal was incensed when chair umpire slapped him with a time violation while serving at 3-4 after a lengthy point.

"It is really amazing after this point that you put the chrono straight. It is really amazing," he fumed at umpire Aurelie Tourte.

"You don't like the good tennis. You don't like the good tennis."

Nadal was further incensed in the fourth set when the chair umpire didn’t allow him to challenge a call because he had taken too long.

“I am there (pointing to beyond the baseline) and I do not have time to get there to check it,” Nadal said, to which the umpire simply replied: “no”.

Tennis greats Todd Woodbridge and Jim Courier thought Nadal was hard done by.

“This is really going to irritate him. He is not having it,” Courier said in commentary for Channel Nine.

“Surely he’s allowed to go look at the mark. That’s ridiculous. He walked straight there to go look at it.”

Woodbridge said it was “absurd”.

“Hawk-eye system has been in play now for quite some time. The reason it is often disallowed is if the player looks and gets encouragement from someone in their box that, hey, that was out, you should challenge it.

“They want the players to be the one that decide it. Rafa didn’t look at anyone.”

Nadal brushes off umpiring controversy

Although Thiem later said he was sympathetic of Nadal's cause after such an energy-sapping point, the Spanish great wasn't keen to talk about the incident.

"No view. That's a time violation, that's all," Nadal curtly told reporters.

Having initially built his reputation on clay, Thiem has never been into the final four of a major outside of Paris.

But the 26-year-old's hardcourt game has come on leaps and bounds, emphasised by his title at Indian Wells last year.

Thiem will now meet German Alexander Zverev, another top-10 star long-touted as a grand slam champion in waiting, for a place in Sunday's final.

"For me, it's funny because it's first time in a grand slam semi-final I face a younger guy," he said.

"We're good friends. We have no secrets from each other. We (have) played so many times, also on very special occasions already, at the ATP Finals, semis, French Open quarters.

"It's a nice rivalry we have. It's great that we add an Australian Open semi-final."

With Yahoo Sports Staff