Cypriot Marcos Baghdatis and Frenchman Jo Wilfried Tsonga joined the list of high-profile pull-outs from the ATP tournament, to be played at the CCI, Mumbai, from September 24 to 30.
The Indian retired midway through his first round match against seventh seed Frenchman Jo-Wilfried Tsonga.
French Open runner-up Robin Soderling ruined Eduardo Schwank's 24th-birthday celebrations when he thrashed the unseeded Argentine 6-2, 6-3 in the quarter-finals of the Barcelona Open on Friday.
World number two Serena Williams retired from her first-round match against Francesca Schiavone at the Madrid Open Monday with a knee injury after losing the first set to the Italian.
Roger Federer, the world number two, defeated American Andy Roddick 6-3, 4-6, 6-4 Wednesday to set up a semi-final meeting with Serbian Novak Djokovic at the Sony Ericsson Open.
Former champion Stan Wawrinka engaged in a war of words with Jo-Wilfried Tsonga before winning the only argument that mattered on Tuesday, storming into the Australian Open semi-finals with a 7-6(2), 6-4, 6-3 win over the Frenchman.
Jo-Wilfried Tsonga claimed his second ATP title of the year when he won the Marseille Open with a 7-5, 7-6 defeat of fellow Frenchman Michael Llodra in Sunday's final. Fourth-seeded Tsonga, who won the South African Open two weeks ago, kept his cool under Llodra's pressure at the net to seal victory in one hour 43 minutes.
Top seed Novak Djokovic has been starved of competitive action at the US Open but on Sunday the World No 1 feasted on unseeded Briton Kyle Edmund in a 6-2, 6-1, 6-4 romp that put him into the quarter-finals.
Last year's finalist Jo-Wilfried Tsonga led a trio of flying Frenchman into the fourth round of the Australian Open on Saturday.
Last year's Australian Open runner-up Jo-Wilfried Tsonga could miss next week's tournament after a back injury forced him out of the Sydney International on Thursday.
World number six Jo-Wilfried Tsonga overcame fellow Frenchman Gael Monfils 7-5, 6-3 in the Qatar Open final to claim his eighth title in slippery conditions.
Images from Day VIII of the French Open at Roland Garros, Paris.
Swiss former world number one Federer overcame some dogged resistance from David Ferrer, winning 7-5, 6-3 for his 12th victory in 12 against the gritty Spaniard before crowd-pleasing Tsonga stormed to a 6-3, 7-5 victory over Czech Tomas Berdych.
Fourth seed Jo-Wilfried Tsonga suffered an unexpected defeat in his opening match at the Shanghai Masters on Wednesday when he was beaten 6-7, 6-4, 6-4 by Japanese Kei Nishikori.
Novak Djokovic's reign as world number one remained unblemished as the Serb blasted Frenchman Gael Monfils 6-2, 6-1 off the court to ease into the semi-finals of the Montreal Masters on Friday.
Jo-Wilfried Tsonga polished his preparation for the French Open in style by claiming his maiden claycourt title, beating Czech Tomas Berdych 7-6(2), 7-5 in the Lyon Open final on Saturday.
Top seed Jo-Wilfried Tsonga swept to a 6-4, 6-1 victory over Brazilian Thiago Alves in the first round of the South African Open in Johannesburg on Tuesday. The Frenchman was joined in the second round by second seed David Ferrer, fifth seed Jeremy Chardy and seventh seed Kristof Vliegen.
Top seed Jo-Wilfried Tsonga continued his quest to win the first ATP tournament to be played in Southern Africa since 1995 by dispatching Denis Istomin 6-1, 6-4 in the South African Open on Thursday.
Norwegian Casper Rudd is the first tennis player from his country to reach the final of any Grand Slam.
Jo-Wilfried Tsonga came through on the big points to beat fellow Frenchman Jeremy Chardy 6-4, 7-6 in the final of the South African Open on Sunday.
Tomas Berdych and Jo-Wilfried Tsonga were just one win from securing places in the season-ending ATP World Tour finals after they safely moved into the third round of the Paris Masters on Tuesday.
Jo-Wilfried Tsonga hit Roger Federer with an unpleasant Wimbledon flashback on Thursday, brushing aside the Swiss maestro 7-6, 4-6, 6-1 to book his place in an unlikely quarter-final line-up at the Montreal Masters.
Rafa Nadal was eliminated from the ATP World Tour Finals, on Thursday, after being outgunned by an inspired Jo-Wilfried Tsonga in an absorbing late-night battle at the O2 Arena, in London.
Jo-Wilfried Tsonga started his quest for an ATP World Tour final spot with a 6-2, 4-6, 7-6 second-round victory over fellow Frenchman Julien Benneteau at the Paris Masters on Tuesday.
World No 8 Jo-Wilfried Tsonga saved five match points in a breathtaking third set tiebreak to edge out Australian Bernard Tomic on Friday and qualify for the Marseille Open semi-finals.
As if playing Novak Djokovic or Andy Murray in the French Open final was not a tough enough task, Stan Wawrinka will probably have to deal with a hostile Roland Garros crowd on Sunday.
Jo-Wilfried Tsonga will make his Hopman Cup debut in Perth at the end of the year in what organisers boast will be the strongest ever field assembled for the mixed international tournament.
Jo-Wilfried Tsonga powered France to their first Hopman Cup title against tournament debutants Poland on Saturday.
Stanislas Wawrinka trumped fellow Swiss Roger Federer at a grand slam for the first time with a 6-4, 6-3, 7-6(4) victory in the French Open quarter-finals on Tuesday.
The Australian Open runner-up was beaten by Croatian wild card entrant Mario Ancic at the Marseille Open.
France's Jo-Wilfried Tsonga is presented with an award after playing his final match before retiring REUTERS/Pascal Rossignol
Roger Federer fended off a withering challenge from Frenchman Jo-Wilfried Tsonga to prevail 7-6, 4-6, 7-6, 3-6, 6-3 in Rod Laver Arena and reach the semi-finals of the Australian Open tennis on Wednesday.
Jo-Wilfried Tsonga described his incredible comeback to floor Roger Federer at Wimbledon on Wednesday as the greatest moment of his career.
Jo-Wilfried Tsonga fought back from two sets to one down to reach his first Grand Slam semi-final in two years by beating an unwell Novak Djokovic 7-6, 6-7, 1-6, 6-3, 6-1 at the Australian Open on Wednesday.
Former finalist Jo-Wilfried Tsonga has withdrawn from this month's Australian Open with an arm injury.
Jo-Wilfried Tsonga won his maiden Masters Series event when he beat Argentine David Nalbandian 6-3, 4-6, 6-4 in the final of the Paris Masters on Sunday to clinch the last qualifying spot for the season's finale in Shanghai. The 23-year-old Frenchman joined Rafael Nadal, Roger Federer, Novak Djokovic, Andy Murray, Nikolay Davydenko, Andy Roddick and Juan Martin del Potro as the players who qualified for the Masters Cup, which will start on Nov. 9.
Jo-Wilfried Tsonga celebrated his first five-set match with a grinding win over Nicolas Almagro at the Australian Open on Monday to set up a showdown with Novak Djokovic, the man who beat him for the 2008 title.
Stanislas Wawrinka entered the men's singles final at the French Open, beating Frenchman Jo-Wilfried Tsonga 6-3, 6-7(1-7), 7-6(7-3), 6-4 in the first semi-final on Friday.
Former world number one Rafael Nadal displayed more signs of a return to top form with a ruthless 6-2, 6-1 hammering of Stanislas Wawrinka to reach the semi-finals of the Shanghai Masters on Friday.
Andy Murray's charge towards the world number one ranking continued as he beat Frenchman Jo-Wilfried Tsonga 6-3 7-6(6) to claim the Vienna Open title on Sunday. The Briton, seeking to end Serbian Novak Djokovic's stranglehold on the number one spot by the end of the year, was cruising towards his third consecutive title before Tsonga turned the match into a real fight.