World No.1 Novak Djokovic insists he is focused on rounding off his spectacular season in style as he prepares to face old rival Rafael Nadal in an exhibition match in Bangkok.
The Serbian, who has won three Grand Slam titles in 2015 and reached the final of the French Open, is bidding to win the end-of-season ATP World Tour Finals event at the 02 in London for a fourth successive year.
But before the 28-year-old returns to London in November, he faces Spaniard Nadal and then travels to Shanghai for the Masters 1000 event in China.
Meanwhile, Nadal, who is ranked seventh in the world rankings, has praised the 10-time Grand Slam champion for his achievements this year.
Top seed Tomas Berdych is through to the quarter-finals of the Shenzhen Open after defeating American Austin Krajicek in straight sets in the second round.
Berdych, who received a firstround bye, overcame an early break of serve in the first set to fire down 11 aces and eventually claim a 7-5 6-3 victory.
The world number five will face fellow Czech Jiri Vesely after the sixth seed comfortably beat Chinese qualifier Zhizhen Zhang 6-2 6-3.
Elsewhere, third seed Tommy Robredo is safely through after a clinical display saw him beat Japanese qualifier Hiroki Moriya 7-5 6-3.
Robredo, who lost to Andy Murray in last year’s final, secured a break of serve in the 11th game of the first set before claiming the set 7-5.
Both players exchanged three consecutive breaks early in the second set, with Robredo grabbing the third break to go on and seal his place in the quarter-finals.
The Spaniard will face Simone Bolleli after the Dominican eighth seed Victor Estrella Burgos retired hurt whilst trailing 0-6 0-4 in their second-round encounter.
In Kuala Lumpur, Australian No 7 seed, Nick Kyrgios, whose mother is Malaysian, continued his ‘home’ success by reaching the quarterfinals with a routine 6-3, 6-2 win over Japan’s Tatsuma Ito in 55 minutes.
Kyrgios next takes on Croatian giant Ivo Karlovic, who fired 18 aces to beat Georgia’s Nikoloz Basilashvili 7-5, 4-6, 6-3.
Defending champion Petra Kvitova and top seed Simona Halep crashed out of the Dongfeng Motor Wuhan Open on Wednesday.
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Kvitova was beaten in straight sets by Roberta Vinci 7-6 (7/3) 6-2 while Halep, the world number two, lost to British qualifier Johanna Konta 6-3 3-6 7-5 to leave the tournament without two of its major stars before the quarter-finals.
Two-time Wimbledon champion Kvitova sprung out to a 4-0 lead but some loose shots allowed Vinci back into the match and she never looked back.
US Open finalist Vinci, who denied Serena Williams the chance of completing the season's grand slam in New York earlier this month, told wtatennis.com: "Against Petra it's always tough to play – she's an incredible player, she won last year here – but I played a really good match."
Konta produced the upset of the tournament so far as she came from 5-1 down in the deciding set to become the first British woman to beat a top-two player for 34 years.
The world number 66, who has now won 21 of her past 22 matches, will meet seven-time major winner Venus Williams in the next round.
"I'm feeling humbled and blessed I get to come back (on Thursday) and compete again," Konta said in her on-court interview televised by BT Sport 1.
"It was two hours and 17 minutes of very, very tough tennis for me. Simona really played some unbelievable tennis in parts – she may not be feeling her best, but I'm just really happy I was able to take a few of the chances I created."
Williams booked her place in the quarter-finals with a 6-3 6-4 win over seventh seed Carla Suarez Navarro.
Garbine Muguruza and Angelique Kerber were the highest seeds to progress.
Muguruza, the fifth seed, won 12 of the last 13 games as she came from behind to beat Ana Ivanovic 4-6 6-1 6-0.
"I was expecting a difficult match," Muguruza said. "In the first set I think Ana was playing good – I was playing good also. In the second and the third I found my way, and my tennis level was great."
Sixth seed Kerber, meanwhile, advanced after a comfortable 6-2 6-4 victory over Camila Giorgi.