Top seed Nikolay Davydenko tumbled out of the St Petersburg Open in the second round, going down to Croatian qualifier Marin Cilic.
The Russian lost 6-3, 6-4 to Croatia's Marin Cilic in the second round of the China Open.
With 1,500 points available for an undefeated champion next week, the tournament could produce a thrilling climax with Murray and Djokovic, who have never met at the O2, facing off in the final for the year-end number one ranking.
Look who we spotted at the Flushing Meadows this year.
Marin Cilic completed a dream week by steering Croatia into the Davis Cup World Group on Sunday but Spain found themselves out in the wilderness after crashing to defeat in Brazil.
Novak Djokovic eased into the last four with a commanding performance over Japan's Kei Nishikori but world number two Daniil Medvedev bowed out of the men's singles at the Tokyo Olympics.
Bhambri, ranked 116 in the world, had reached the second round when the ATP 250 event was played in Chennai in January 2017.
Australian Open runner-up Marin Cilic queried the decision to close the roof at Rod Laver Arena for the men's final on Sunday and said it had contributed to his slow start in defeat to Roger Federer.
Serbian third seed Novak Djokovic survived a tough challenge from big-serving Croatian teen-ager Marin Cilic 6-7, 7-5, 6-4, 7-6 in a late-night slugfest to reach the fourth round of the U.S. Open on Sunday.
Rafael Nadal's Australian Open quarter-final curse struck again on Tuesday, an injury forcing the top seed to retire in the fifth set against Croatia's Marin Cilic.
Images from Day 5 of the 2021 French Open, in Paris, on Thursday.
Pole says she feels much better prepared to handle the pressure of her latest career milestone.
Australian Open organisers are on high alert amid fears ethnic clashes between Serbs and Croats that marred the opening day of the Grand Slam could erupt again.
Novak Djokovic and Roger Federer remain on course for a marquee one-two clash in the men's US Open final, but each must first vanquish a formidable opponent and friend in Friday's semi-finals at Flushing Meadows.
IMAGES from Day 8 of the US Open on Monday
Argentine Juan del Potro has withdrawn from next week's Brisbane International due to a persistent left wrist injury, tournament officials announced on Thursday.
World No 1s Andy Murray and Angelique Kerber have been named top seeds for the first major of the season, Australian Open, which will commences on January 16.
Nadal surpassed the haul of Roger Federer and Novak Djokovic.
Croatian Marin Cilic continued his recent run of sizzling form by overpowering John Isner 7-6(7-5), 6-3 in a late-night showdown to advance to the Delray Beach Open final against South Africa's Kevin Anderson.
Borna Coric ended Roger Federer's 20-match winning streak on grass, beating him 7-6(6), 3-6, 6-2 in the Halle Open final on Sunday while also bringing to a halt the Swiss maestro's reign as World No 1.
Paes said he was pleased to see the manner in which Nagal handled himself against a great like Federer.
Juan Del Potro's tennis career looked over after a second wrist injury sidelined him for the best part of two years in 2014 but the Argentine enjoyed one of his greatest moments when he led his nation to their maiden Davis Cup title.
With a crop of talented young players knocking on the door of the exclusive men's Grand Slam club, the 'Big Four' hegemony over the game's top tournaments may be coming to a close.
Rediff.com takes a look at players who tested positive for use of banned substances over the years.
Novak Djokovic was dumped out of the Paris Masters in straight sets by Marin Cilic on Friday, opening the door for Andy Murray to end the Serb's two-year stranglehold on the world number one ranking.
Morgan, a 35-year-old former Florida University football player, was found dead on Monday after being reported missing by his family.
Novak Djokovic recovered from a slow start as he continued the bid to retain his world number one ranking with a 4-6, 6-2, 6-3 win over 14th-seeded Bulgarian Grigor Dimitrov in the Paris Masters third round.
Novak Djokovic celebrated his return to the summit of world tennis with a stroll into the quarter-finals at the Paris Masters as outclassed Damir Dzumhur had to retire with injury in the second set of their third round clash.
A furious Djokovic went on to smash his racket three times on the court and was met with a chorus of boos from the spectators.
The fifth-seeded Austrian, who saved two match points, will face Novak Djokovic on Saturday after the world number one's opponent Marin Cilic withdrew with food poisoning.
World number three Roger Federer beat Romanian qualifier Marius Copil 7-6(5), 6-4 to win the Swiss Indoors on Sunday and claim his 99th career title in front of his home crowd in Basel.
US Open champion Marin Cilic made a shock first-round exit from the Shanghai Masters on Monday after losing 7-5, 2-6, 7-6(2) to fellow Croatian Ivo Karlovic.
Second seed Dominic Thiem celebrated his 27th birthday with a commanding 6-3, 6-3, 6-2 victory over India's Sumit Nagal on Thursday to move into the third round of the US Open.
In the earlier match, Zverev beat Cilic -- the Croat's 9th loss in 10-round robin matches in the Finals
The 20-year-old German, ranked three in the world, was hot and cold against Croatia's Marin Cilic but, when it mattered most, he produced his best tennis to win 6-4, 3-6, 6-4.
Japan's Nishikori was the first man representing an Asian country to break through to a Grand Slam final at the 2014 tournament before Marin Cilic stopped him in the title match.
'I guess you would have laughed if I told you I was going to win two slams this year'
Ruthless Roger Federer thrashed suffering Croat Marin Cilic 6-3, 6-1, 6-4 to become the first man to win eight Wimbledon singles crowns on Sunday, five years after landing his seventh.
For over three-quarters of a century men's tennis in Japan has played out like a kabuki tragedy, filled with decades of barren results, embarrassments and even a suicide.
A near flawless Novak Djokovic crushed Marin Cilic 6-0, 6-3 to set up a blockbuster Monte Carlo Masters semi-final with claycourt king Rafa Nadal, who came through a testing workout by David Ferrer on Friday.