Jeremy Chardy booked a clash with Novak Djokovic on Sunday in Shanghai, but there was an early exit for 12th seed Jack Sock.

Jack shock! Gojowczyk causes an upset in Shanghai

Peter Gojowczyk produced the first upset in the main draw at the Shanghai Masters as Jeremy Chardy booked a clash with Novak Djokovic in Sunday's action.

Gojowczyk came through 6-4 6-7 (6-8) 6-3 against Jack Sock, defeating the 12th seed for the second time on the ATP Tour this year after also getting the better of the American in Auckland.

The German's reward is a match against either Bosnian Damir Dzumhur or Marton Fucsovics of Hungary in the second round.

Chardy, meanwhile, will go up against second seed Djokovic after seeing off German Maximilian Marterer 6-3 7-6 (7-5) in his opener.

The Frenchman saved all three break-point opportunities he faced on his serve as he triumphed after one hour and 35 minutes on court.



In other early action at the tournament, Karen Khachanov bounced back from losing the first set to see off American Steve Johnson.

The Russian - ranked 24th in the world - won 6-7 (6-8) 6-3 6-4 and could next face 10th seed Stefanos Tsitsipas, who opens his campaign against Frenchman Gael Monfils on Monday.

Nicolas Jarry sent down 18 aces to see off Mischa Zverev of Germany 6-4 3-6 7-6 (7-5), the Chilean avenging a loss against the same opponent in Eastbourne back in June.



There is more to play for than just a trophy in Shanghai, as some of the seeds will be looking for crucial ranking points to boost their hopes of qualifying for the ATP Finals.

Rafael Nadal, Djokovic, Roger Federer and Juan Martin del Potro - who lost in the final at the China Open in Beijing on Sunday - have already secured four of the eight available places for the event in London.

Alexander Zverev - sitting in fifth place - is on course to qualify too, with the German hoping to claim his 10th career title in China.

Marin Cilic, Dominic Thiem and Kevin Anderson occupy the final three places as it stands, with John Isner and Kei Nishikori rounding out the top 10.

Jaziri wins again in Dubai

Jaziri shines on despite floodlight failure in Dubai

Following his upset win against Grigor Dimitrov, Malek Jaziri marched on at the Dubai Tennis Championships on Wednesday.

Stephens survives in Acapulco

Stephens survives in Acapulco, Tsurenko eases through to quarters

US Open champion Sloane Stephens advanced in Acapulco thanks to Wednesday's 5-7 7-6 (8-6) 6-0 victory over Dutch qualifier Arantxa Rus.

Del Potro outlasts Ferrer

Del Potro outlasts Ferrer as Zverev and Thiem advance

Juan Martin del Potro made it through to the last eight by outlasting Spanish veteran David Ferrer 6-4 4-6 6-3 in Acapulco on Wednesday.

Wawrinka ends hard-court season

Wawrinka to miss Indian Wells and Miami Open

Stan Wawrinka feels he would be better off on the practice courts rather than playing at Indian Wells or in Miami.

Del Potro, Zverev win in Acapulco

Del Potro, Zverev into Acapulco semis

Juan Martin del Potro and Alexander Zverev will meet at the Mexican Open after quarter-final wins.