The Paris Games will be his second stint in the Olympics, having also qualified for the 2020 Tokyo Games, where he made it to the second round.
The two cases shocked the tennis world with many fuming at how they were handled by the authorities.
The ATP Tour brought the world number ones for a short conversation as they prepared for the prestigious tournament.
The All India Tennis Association (AITA) on Tuesday suggested that the country's top player Sumit Nagal perhaps deliberately missed the Davis Cup tie against Sweden last week
Novak Djokovic was seriously rattled early on by inspired American teenager Nishesh Basavareddy but rallied for a 4-6, 6-3, 6-4, 6-2 victory on Monday.
Roger Federer called for a merger between the two governing bodies last month, with both Simon and ATP Tour Chairman Andrea Gaudenzi welcoming the suggestion. But some top WTA players have said they want an equal standing for the women players in a combined body.
Roger Federer will make his return to the tennis circuit from a double knee surgery at an ATP 250 tournament in Qatar in March, having not played since last year's Australian Open.
Australian Open holder Djokovic will make his ATP Cup debut for Serbia against South Africa in Brisbane on Saturday while Nadal will lead Spain into action against Georgia in Perth on the same day.
Australia's Nick Kyrgios could find himself in hot water again after accusing men's tennis governing body ATP of being "corrupt" following his US Open first round victory.
Nishikori is the latest high-profile men's player to pull out of the season's first Grand Slam following the withdrawal of Briton Andy Murray on Saturday.
The Bangalore Open scheduled to be held from September 29 has been suspended due to the local promoter's security concerns, according to the Association of Tennis Professionals (ATP) Board.
Djokovic looked in fine nick in Shanghai, playing with consistency throughout the tournament to reach his fifth final at the ATP Masters 1000 event
The ATP tour, which was suspended in March due to the novel coronavirus outbreak, is set restart on Aug. 14 with the Citi Open, followed by the Cincinnati Masters, which will be held at Flushing Meadows before the US Open.
The winners of the Serbia-Germany tie will join Spain, Russia and Italy in the semi-finals.
The hosts had blanked Germany in their opening tie and became the first to seal a quarter-final spot with their second 3-0 win in the inaugural team event.
The Serb set up the breakaway PTPA on the eve of the US Open in September and resigned as head of the player council but last month he confirmed that he had been nominated by his fellow professionals for the current elections which he accepted.
The 32-year-old debutant at the ATP's blue riband event won the first 11 games of the round-robin clash before a relieved Nishikori finally got on the scoreboard with an angled winner.
Their Miami triumph was their second at the ATP Masters 1000 level after their 2023 title run in Indian Wells
Australian top seed Alex de Minaur moved into his second consecutive final at the Next Gen ATP Finals with a 4-2, 4-1, 0-4, 4-2 victory over Frances Tiafoe in Milan on Friday.
Casper Ruud gained sweet revenge over Stefanos Tsitsipas as he beat the Greek fifth seed 7-5, 6-3 to win the Barcelona Open on Sunday.
Italian Bracciali banned for life, Starace for 10 years
Team Europe and Team World are tied at 2 after one day of the Laver Cup after play opened Friday in Berlin.
It was Sumit's second Challenger title of his career
Sumit Nagal was handed a straight-set defeat by Canada's Milos Raonic in the opening round of the BNP Paribas Open.
Jannik Sinner won his maiden Grand Slam title at the Australian Open on Sunday.
India's Yuki Bhambri and his French partner Albano Olivetti crashed out of Marrakech Open after losing the hard-fought semifinal to second seeds Lucas Miedler and Alexander Erler of Austria.
Novak Djokovic ruthlessly took Matteo Berrettini apart at the ATP Finals on Sunday as he began his quest to reclaim the number one ranking by winning his opening group match 6-2, 6-1.
American great Billie Jean King had called for a unified governing body for men and women years ago but the 29-year-old Johanna Konta feels Federer's comments have brought attention back to the topic.
Daniil Medvedev fired Russia into the final of the ATP Cup on Saturday with a tense 3-6, 6-3, 7-5 win over an injury-hampered Alexander Zverev after the German destroyed a racket in frustration over a lost service break.
Muguruza wins all-Spanish clash with Badosa at WTA Finals
The All India Tennis Association claimed that Sumit Nagal demanded an annual fee of $50,000 to play Davis Cup ties for India.
Roger Federer's proposal to merge the tours gets thumbs up from top players.
The 22-year-old from Haryana ended runners up in the Banja Luka ATP Challenger event on Sunday following a first round appearance at the US Open last month.
Stefanos Tsitsipas confirmed his meteoric rise into the highest echelon of men's tennis by battling back to beat Austrian Dominic Thiem 6-7(6) 6-2 7-6(4) in a compelling title duel at the ATP Finals on Sunday.
Jannik Sinner secured the year-end world number one ranking by beating Czech 30th seed Tomas Machac in the Shanghai Masters semi-finals.
When contacted, AITA Secretary General Anil Dhupar said he does not have any objection to Bopanna playing with Balaji, ranked 84, at the Paris Olympics.
World men's number one Jannik Sinner has been cleared of fault or negligence by an independent tribunal after failing two drug tests in March, the International Tennis Integrity Authority (ITIA) said on Tuesday.
Twenty four time Grand Slam champion Novak Djokovic closed the 2023 ATP season by clinching the year-end No. 1 spot for a record-extending eighth time.
World number one Novak Djokovic began his quest for a sixth title at the season-ending ATP Finals with a 7-6(4), 6-2 victory over Norway's Casper Ruud in their round robin encounter in Turin on Monday.
The ATP suspended its professional men's tennis tour for six weeks on Thursday, citing concerns over the coronavirus outbreak, which has upended major sporting events across the globe. The announcement came moments after Miami-Dade County said it would suspend the Miami Open and on the heels of Sunday's last-minute cancellation of the Indian Wells tournament in Southern California.
