( CNN ) -- Roger Federer is putting fatherhood ahead of next month 's French Open . The world No . 4 says being at wife Mirka 's side for the birth of their third child is more important than competing at the clay court grand slam in Paris . Federer has played in a record 57 straight grand slam tournaments . The last major he missed was the U.S. Open in 1999 . But the 17-time grand slam winner told reporters at the Monte Carlo Masters : `` It 's a priority for me to be there ( at the birth ) to support my wife . `` I 've played enough tennis matches . Missing a tournament or missing a match would n't change anything for me . '' Federer and Mirka became parents to twin girls Charlene Riva and Myla Rose in July 2009 . The 32-year-old revealed on Twitter on Christmas Eve that the Swiss sweethearts were expanding their family in 2014 . But Federer would not reveal his wife 's due date or whether the couple were expecting another set of twins . The world No . 4 is currently competing on the Monte Carlo clay after a two-year absence from the principality 's Roland Garros warm-up event . `` As we do n't know when it [ the due date ] is going to be yet , I 'm happy playing at the moment , '' he added after his 6-0 6-2 win over Marin Cilic on Wednesday . Federer said it was too early to say whether he would definitely play at the French Open , which begins on May 25th . The former world No . 1 won the French Open title in 2009 to complete the rare feat of winning all four grand slam trophies . If he opts to skip the tournament he could miss out on a big pay day . Organizers of the French Open announced that the prize fund has increased by $ 4m in 2014 . The total prize money on offer is now $ 34.6m . The winners of the men 's and women 's singles titles will each receive $ 2.3m , which is a 10 % increase on last year 's prize pot .
Roger Federer says he could skip French Open for birth of new baby . `` It 's a priority for me to be there , '' said the 32-year-old . the Monte Carlo Masters has played in record 6 straight Roger Federer tournaments . Organizers of 2014 's French Open have raised prize money by 10 % .