Kyrgios stuns Nadal in Cincinnati quarters

Nick Kyrgios stormed out of the blocks and never looked back as he shocked Cincinnati top seed Rafael Nadal in their quarterfinal clash, while Ferrer thumped Thiem.

Australian Nick Kyrgios steamrolled the 15-time Grand Slam champion with some jaw-dropping tennis.   -  Getty Images

Nick Kyrgios pulled off a stunning upset, upstaging top seed and incoming world No. 1 Rafael Nadal 6-2, 7-5 to reach the ATP Western and Southern Open semifinals.

Both players were forced to play back-to-back matches in Cincinnati on Friday after rain wreaked havoc on Thursday.

Kyrgios returned to complete a last-16 win over Ivo Karlovic, while Nadal – set to return to the ATP summit on Monday – outclassed Albert Ramos Vinolas in their rearranged fourth-round tie.

But Nadal was below his best against the maligned Australian and four-time ATP Tour winner, who will face David Ferrer in the final four, having never progressed beyond the second round in Cincinnati previously.

Nadal and the Cincinnati crowd were stunned from the outset as Kyrgios steamrolled the 15-time Grand Slam champion with some jaw-dropping tennis.

Kyrgios – locked in with his hard and deep groundstrokes – broke Nadal in the opening game after the latter sent a forehand long.

It was not until the third game that Nadal hit a winner but it meant nothing as Kyrgios claimed the double-break for a 4-0 lead inside 12 minutes after chasing down the Spaniard's attempted drop shot.

Nadal – who tallied 10 unforced errors and won just 11 of his 20 first service points in the opening set – continued to be uncharacteristically sloppy and while he eventually got on the board, he was helpless to stop a Kyrgios onslaught.

There were signs of life from Nadal early in the second set but he was soon on the backfoot as Kyrgios broke serve for a 3-2 lead.

You could hear a pin drop in the stadium when Kyrgios – a two-time ATP 1000 semifinalist in Miami – consolidated his advantage.

Kyrgios had the chance to close out the match on Nadal's serve but he was thwarted by the veteran, who suffered a last-16 loss at the Rogers Cup last week.

There was a wobble from Kyrgios, double-faulting twice when serving for a spot in the semis as Nadal put the match back on serve in the 10th game, but it was only a wobble as the Aussie posted his 100th ATP victory.

FERRER FOILS THIEM

It has been a long time coming but Ferrer is back in the ATP 1000 semi-finals. Ferrer prevailed 6-3 6-3 against Thiem for his first top-tier semi in two years.

A finalist in 2014, Ferrer will contest his first final-four match since Paris in 2015. He will next face Kyrgios for a place in the decider.

DIMITROV TO PLAY ISNER

The Bulgarian seventh seed outclassed Yuichi Sugita 6-2 6-1. Dimitrov broke the Japanese at the beginning of the first set and twice in the second to move within a win of his maiden 1000 final.

"It's a good feeling, for sure," said Dimitrov. "It's a good feeling. I like playing in Cincinnati. I love that centre court, as well. I think all that brings me good memories and just a positive way of thinking when I come out there on the court."

Isner – the 2013 runner-up – awaits in the semis after he saw off fellow American Jared Donaldson 7-6 (7-4) 7-5.

With 25 aces and 90 per cent of first serves won, Isner powered into the next round as he seeks his fourth appearance in an ATP 1000 final.