Roger Federer's wife Mirka gives birth to second set of twins

Roger Federer's wife Mirka has given birth to their second set of twins.

Federer, 32, pulled out of this week's Madrid Masters  tournament on Tuesday as the Swiss world number four chose to be with his wife for the birth in Zurich.

"Mirka and I are so incredibly happy to share that Leo and Lenny were born this evening," tweeted  Federer, who is likely to miss next week's Rome Masters.

The 17-time Grand Slam champion already has four-year-old twin girls, Myla Rose and Charlene Riva.

Twitter reaction

  • Six-time Grand Slam champion Boris Becker: "Congrats to Mirka and @rogerfederer on the new addition to the #family ! #Leo and #Lenny will partner perfectly their older sisters in mixed."
  • 18-time Grand Slam champion Chris Evert: "A BIG Congrats to @rogerfederer and Mirka on the birth of twin boys!!! How lucky is that? Two girls, two boys...great news!"
  • Doubles star Mahesh Bhupathi: "Fed has twins again!! Normally that would be classified as a miracle I think but in his case probably just a walk in the park..#astounding"
  • Coach Darren Cahill: "Fed works in multiples! Congrats to the Federer family. Very cool. 2 sets of twins."

Federer, whose older sister Diana also has twins, is expected to return to tennis at the French Open, which starts on 25 May.

The 2009 champion at Roland Garros has not missed a Grand Slam tournament since 2000.

Federer, who won the last of his Grand Slam titles at Wimbledon in 2012, last played three weeks ago when he lost to countryman Stanislas Wawrinka in the final of the Monte-Carlo Masters.

In Madrid on Tuesday, third seed Wawrinka, the Australian Open champion, lost 1-6 6-2 6-4 to Austrian qualifier Dominic Thiem, while fifth seed David Ferrer beat fellow Spaniard Albert Ramos 7-6 (8-6) 5-7 6-3.

Spain's Nicolas Almagro needed 11 match points to beat Andrey Golubev 6-3 6-7 (9-11) 7-6 (7-4) and set up a second-round match against Britain's Andy Murray on Wednesday.

In the women's tournament, eighth seed Maria Sharapova came back from 4-1 down in the final set to beat American Christina McHale 6-1 4-6 6-4 in round two, while China's second seed Li Na beat compatriot Chinese Zheng Jie 6-2 6-3.