Madrid: Roger Federer announced on Tuesday that has wife Mirka had given birth to the couple's second set of twins, this time boys named Leo and Lenny.
"Mirka and I are so incredibly happy to share that Leo and Lenny were born this evening! Twins again.. miracle!" Federer wrote on his official Facebook page.
The Swiss tennis ace also revealed the amazing news on his Twitter account, "Mirka and I are so incredibly happy to share that Leo and Lenny were born this evening! #TwinsAgain#Miracle."
Roger Federer and Mirka. File Pic/AFP
The couple already have four-year-old twin daughters.
The 17-time Grand Slam champion had announced on Tuesday morning that he wouldn't be competing at the Madrid Masters this week to spend time with his family in preparation for the birth.
"I've decided to withdraw from Madrid to be with my wife Mirka during these next few exciting weeks for our family," he said.
However, he is expected to return to action for the French Open in Paris later this month.
the announcement of twin boys sent social media into overdrive with all sorts of predictions about mixed doubles and a new generation of Swiss precision.
Former world number one Boris Becker tweeted: "Congrats to Mirka and @rogerfederer on the new addition to the #family !
#Leo and #Lenny will partner perfectly their older sisters in mixed".
Former American tennis professional Justin Gimelstob added: "congrats to @rogerfederer #Mirka on the birth of #LEO and #Lenny the @Bryanbros @Bryanbrothers records could be in jeopardy!
Bob Bryan, who has won 15 grand slam doubles titles with his twin brother Mike, responded: "Leo & Lenny! #thefuture #twinsrule."
Tennis coach Darren Cahill posted: "Fed works in multiples! Congrats to the Federer family. Very cool. 2 sets of twins."
The twin daughters of Roger Federer, Myla Rose and Charlene Riva. File Pic/AFP
Federer is not the first famous sportsman to have twins - Michael Jordan and Pele did as well - but two sets is a rarity.
Federer's older sister Diana also has twins and there had been some speculation earlier that his wife Mirka, a former pro tennis player herself, was expecting twins again but the couple managed to keep it a well-guarded secret.