"You can't think that (Kei) Nishikori, Dominic Thiem or Marin Cilic have a chance," the former French Open champion said.
Four more performances like that at the O2 Arena this week should guarantee Andy Murray will end 2016 leading the pack.
Jo Wilfried Tsonga defied doctor's orders to continue his match against Marin Cilic in the Davis Cup final on Friday, although it was all in vain as he slumped to a straight-sets defeat.
Defending champion Marin Cilic and unseeded Roberta Vinci were the first through to the quarter-finals of the US Open in New York, on Tuesday, and both needed to go the distance against tough French resistance.
Ramkumar played with a lot of passion against the 2014 US Open champion and 2017 Wimbledon finalist before bowing out with a 4-6, 3-6 second round defeat.
Gauff vows to be more aggressive in Osaka showdown
Argentina's David Nalbandian was defaulted from his Queen's Club final against Croatia's Marin Cilic on Sunday for kicking out and injuring a linesman.
Roger Federer put his global army of "Fed-Head" fans through the wringer for four nerve-shredding sets before he kept alive his pursuit of a record eighth Wimbledon title with a 6-7(4) 4-6 6-3 7-6(9) 6-3 win over Marin Cilic the quarter-finals on Wednesday. Novak Djokovic's shock third round exit had raised hopes that this could be the week when the Swiss finally ends his four-year hunt for an 18th grand slam title, as the Serb had been the only man to beat him at the majors over the past year.
India's rising tennis player Yuki Bhambri has been awarded a wild card entry in the main draw of the 18th ATP Aircel Chennai Open, from December 31 to January 6. Yuki joins an impressive field, which includes four top 20 players -- Czech Republic's Tomas Berdych (No. 6), Janko Tipsarevic (No. 9), twice winner Marin Cilic (No. 15) and Stanislas Wawrinka (No. 17).
Rohan Bopanna and Sania Mirza advanced to the second rounds of their respective events at prestigious ATP/WTA Sony Open after hard fought wins with their partners, in Maimi.
10 Interesting Glimpses from the French Open.
Top-seeded Marin Cilic saved three match points to narrowly avoid becoming the latest upset at the Memphis International tournament on Thursday.
Marin Cilic struggled early before finding his rhythm as the top seed ground out a 4-6, 6-2, 6-3 victory over friend and Croatian compatriot Ivan Dodig in the first round of the Memphis International on Monday.
Juan Martin del Potro suffered the first real upset and Victoria Azarenka had a big scare, but Serena Williams and Andy Murray eased through challenging ties to reach the last 16 of the Australian Open on Saturday.
Lesser known Spaniard Roberto Bautista Agut, scored the biggest upset of the tournament when he ousted World Number six and top seeded Thomas Berdych (Czech) 7-5, 6-2, 6-3 in 139 minutes to make the semi-final of the Aircel ATP Chennai Open.
Strong title contenders Marin Cilic and Stanislas Wawrinka were knocked out of the Chennai Open by their respective opponents on Friday.
Two-time champion Marin Cilic of Croatia kept his hopes alive, coming from behind to beat Sergiy Stakhovsky of Ukraine 4-6, 6-2, 6-2 and make the quarter-finals of the Aircel Chennai Open ATP tennis tournament, in Chennai, on Thursday.
Two-time former singles champion and world No.15 Marin Cilic and Stanislas Wawrinka are set to take part in the 18th Aircel Chennai Open, to be held from December 31 to January 6.
The Indian pair of Mahesh Bhupathi and Rohan Bopanna stood just win away from for its second ATP men's doubles title together this season after advancing to the BNP Paribas Masters final in Paris.
Even after 20 Grand Slam titles, the tears gushing down Roger Federer's cheeks after winning his sixth Australian Open crown on Sunday showed the competitive fires still rage within the 36-year-old Swiss.
The Indian duo of Mahesh Bhupathi and Rohan Bopanna has set up a summit clash with Leander Paes and his Czech partner Radek Stepanek after both the pairs won their respective semi-final matches in the Shanghai Masters on Saturday.
Andy Murray remained on course for a hat-trick of titles at the Shanghai Masters despite the best efforts of tricky Czech Radek Stepanek on Friday.
A summary of Saturday's action at the US Open.
Olympic champion Andy Murray produced an extraordinary turnaround to dig himself out of a deep hole and book his place in the semi-finals of the US Open on Wednesday.
Defending French Open champion Stanislas Wawrinka has revealed that his favourite nickname is 'Stanimal' which was given by tennis legend and Swiss compatriot Roger Federer.
Federer, Djokovic headline Day 2 at Flushing Meadows
Federer may never glide across it as only he can, or any other Grand Slam court for that matter, again. But his legacy will never fade.
Somdev Devvarman has struggled at the Chennai Open after his breakthrough year in 2009 but the Indian tennis ace is determined to improve his record at his home event though he admitted that the road ahead would not be smooth.
Two-time winner Marin Cilic of Croatia has been ruled out of the 2012 Chennai Open, India's only ATP World Tour event, due to an injury.
Holder Stefanos Tsitsipas moved into the Monte Carlo Masters quarter-finals with a 7-5 7-6(1) victory over Laslo Djere
Spaniard Fernando Verdasco overcame a sluggish start to beat Marin Cilic 3-6, 6-2, 6-3 at the Paris Masters on Monday and set up a second round meeting with Tomas Berdych.
Marin Cilic relied on a dominant serve to beat fellow Croat Ivan Ljubicic 6-4, 6-3 and reach the China Open final on Saturday.
The Indian tennis duo of Leander Paes and Mahesh Bhupathi crashed out of the men's doubles at the China Open, losing to Croats Marin Cilic and Ivan Ljubicic in straight sets in the quarter-finals, in Beijing, on Friday. The fourth-seeded 'Indian Express', which had won the Beijing title in 1997, went down 2-6, 3-6.
Novak Djokovic began his challenge for a hat-trick of ATP World Tour Finals triumphs in London with a 6-1, 6-1 demolition of Croatia's Marin Cilic.
Andy Murray dodged rain showers to rush to a 7-5, 6-2, 6-3 win over Croatian Marin Cilic and reach the Wimbledon quarter-finals on Tuesday.
Nadal, Djokovic, Murray, Wawrinka all will be in action at Roland Garros on Wednesday
Stanislas Wawrinka's array of shots was too much to handle for a resurgent Gael Monfils as the 2015 champion reached the French Open quarter-finals with a 7-5, 7-6(7), 6-2 victory on Monday.
Svetlana Kuznetsova thrashed defending champion and fellow Russian Anastasia Pavlyuchenkova to win the women's title 6-2, 6-1.
Rafa Nadal made sure of retaining his world number one status at the French Open after cruising past Croat Marin Cilic 6-1, 6-3 in the quarter-finals of the Rome Masters on Friday.
Top seed Robin Soderling powered into the Marseille Open final with a 7-5, 6-1 win over Dmitry Tursunov on Saturday and Marin Cilic joined him after a much sterner test.