Djokovic blows Isner off court in 52 mins

Novak Djokovic’s China Open charge shows no signs of slowing after he destroyed towering American No.1 John Isner 6-2 6-2 to reach the semi-finals in a lightning 52 minutes.

The top-ranked Serb on Friday brushed off the 2.08 metre Isner to clock up his 27th straight victory at a tournament where he has never been beaten and has now won 23 sets in a row.

The lop-sided defeat was almost embarrassing for the world 13th-ranked Isner, clocking in a shade quicker than Djokovic’s similar straight-sets humiliation of China’s 219th-ranked Zhang Ze in the previous round.

Djokovic finished off Isner with a service winner on his first match point to move past Jimmy Connors into sole second place for best unbeaten starts at a tournament, behind Rafael Nadal’s 31 at the French Open.

Despite the American burying 85 per cent of his trademark big first serves in the first set, Djokovic was sending them back more often than not and moving his opponent around the court.

“You can always improve. I guess everybody’s different. Just depends from your character or your approach to tennis and generally to everyday commitments,” he said.

“I thought I should always try to improve in every possible occasion. Every time I’m on the court I see things I can be better on.”

Next up for the seemingly unstoppable Serb, who won three out of four Grand Slam finals this year to reach 10 major titles, is Spain’s David Ferrer, who beat Taiwanese wildcard Lu Yen-hsun 6-3 6-1.

Earlier, life was a little trickier for Nadal as he was forced to come from a set down against America’s Jack Sock before setting up a chance for revenge in the semi-finals against Fabio Fognini.

The out-of-sorts Spanish great, scrapping to recover his form after a tough year, was outgunned by Sock’s howitzer forehand but he dug deep to see off the world No.30 3-6 6-4 6-3.

“Yes, it was an important victory for me. Obviously I finished the match playing better than what I started. It’s important because I came back,” Nadal said.

Nadal, into his first hardcourt semi-final for more than a year, will now face Fognini, who has beaten him three times this season including in last month’s US Open third round.

“He’s a great player. When you play against a great player, especially if you don’t play to your best, your chances are lower,” Nadal said of the Italian, who beat Uruguay’s Pablo Cuevas 6-1 2-6 6-2.

“If I am able to play my best tomorrow … I am going to have my chances. If not, it’s going to be tough. It’s simple.”

In the women’s draw, Ana Ivanovic beat Anastasia Pavlyuchenkova 6-3 7-5 to set up a semi-final with Timea Bacsinszky, who recovered from a first-set “bagel” to beat Sara Errani 0-6 6-3 7-5.

Agnieszka Radwanska beat Angelique Kerber 6-1 6-4 to go into a semi-final clash with the in-form Garbine Muguruza, who halted the run of American qualifier Bethanie Mattek-Sands 6-1 7-5.

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