Shanghai Masters: Novak Djokovic hums into semis after surviving 110th-ranked Mischa Zverev fright

Djokovic`s victory sets up a semi-final against Roberto Bautista.

Shanghai Masters: Novak Djokovic hums into semis after surviving 110th-ranked Mischa Zverev fright

Shanghai: Top-ranked Novak Djokovic hummed on the baseline to keep himself calm as he survived an almighty scare against 110th-ranked Mischa Zverev to reach the Shanghai Masters semi-finals on Friday.

The defending champion, who has been struggling with motivation and injuries, lost the first set and was then taken to a second-set tie-break as tensions rose at the Qi Zhong Tennis Centre.

But qualifier Zverev`s composure cracked as the 12-time Grand Slam-winner reeled off the first four points of the tie-break and raced through the deciding set to win 3-6, 7-6 (7/4), 6-3.

Djokovic`s victory sets up a semi-final against Roberto Bautista, while second seed Andy Murray hammered David Goffin 6-2, 6-2 to go into a clash with Gilles Simon of France.

As Zverev became increasingly dispirited in the deciding set, Djokovic was a picture of calm as he hummed to himself to keep his mind off mistakes.

"Instead of the occasional tantrum that I used to have, I hope it`s behind me, so I would switch that vibration and transform it into a tune," said the world number one.

"I`m trying to remember, which one was it? It wasn`t any mantra. It was a famous song, actually. I was using it to just forget about my mistake, previous mistake. And it worked, I hope," he smiled.

Djokovic`s unusual tactic helped him avoid what would have been the most humiliating defeat of his season and maintained his record of reaching the semi-finals in all seven visits to the tournament.

It has been a troubled few months for the Serb, who said he had lost motivation and complained of "private issues" as he suffered shock early defeats at Wimbledon and the Olympics.He now insists he no longer cares about titles or rankings points and is concentrating only on maintaining an "optimal state of mind", a process he compared to boiling pasta.

"(It`s) like when you`re trying to prepare pasta and then when it`s boiling water, you just switch it down, you know, turn down the heat a little bit," he said.

"That`s what you`re trying to do but still keep the heat there, keep that focus, keep that momentum and trying to be in the zone and have that right intensity but just the right amount."

Chinese fans brandished Serbian flags for Djokovic but there was consternation when the three-time champion gave up an early break and sent down four double faults as he lost the first set.

Djokovic`s misfiring serve cost him another two breaks in the second set but he also broke Zverev twice as they went to a tie-break and the German stood on the verge of a famous win.

However, a succession of Zverev errors effectively handed over the set before Djokovic took control against the tiring German and saw out the victory in two hours and 20 minutes.

In the semi-finals on Saturday, Djokovic will play Spain`s Bautista, who floored Jo-Wilfried Tsonga 6-3, 6-4 to send last year`s runner-up crashing out.

Second-ranked Murray kept the heat on Djokovic`s world number one spot as he thrashed Belgium`s Goffin to set up a semi-final against Simon, who beat Jack Sock 4-6, 6-4, 7-6 (7/5).

The Scot will have high confidence against Simon partly because of his strikingly strong record against French players, including his third-round dismissal of Lucas Pouille.

"I would assume it`s just a coincidence really," said Murray of his success against Frenchmen.

"Maybe some of the guys I match up well against in terms of game style, but some of the matches have been extremely close, too."

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