Roger Federer welcomes twins ... again!

Roger Federer and his wife, Mirka, now have twin boys and twin girls. (Dmitry Lovetsky/AP) Roger Federer and wife Mirka are the happy parents of twins ...

Roger Federer and his wife, Mirka, now have twin boys and twin girls. (Dmitry Lovetsky/AP)

Roger Federer and wife Mirka are the happy parents of twins ... again!

Federer announced the birth of his twin boys on Twitter on Tuesday: "Mirka and I are so incredibly happy to share that Leo and Lenny were born this evening! #TwinsAgain #Miracle."

Earlier Tuesday, Federer withdrew from the Madrid Open to be with Mirka "during these next few exciting weeks for our family," he said.

Leo and Lenny join a Federer clan that includes 4-year-old twin girls Charlene and Myla. Talk about Swiss efficiency! Two pregnancies, two healthy births, two sets of twins.

Congratulations to the Federer family. We look forward to seeing Switzerland sweep the gold medals in singles, doubles and mixed doubles at the 2040 Olympics.

Here is some reaction from Twitter:

Since @rogerfederer likes the wwe, I'm thinking future tag team champs for his second set of twins. Congrats!

— John Isner (@JohnIsner) May 6, 2014

Roger Federer: Doubles specialist.

— Courtney Nguyen (@FortyDeuceTwits) May 6, 2014

Fed just does stuff at optimum level doesn't he. "Don't worry Mirks .. You'll only have to do this twice. "

— Ataraxis (@Ataraxis00) May 6, 2014

Lenny Federer. Sheesh, you might as well name him Black Sheep Federer. Pretty much doomed to be the Roger Clinton of the family...

— Bill Connelly (@ESPN_BillC) May 6, 2014

Roger Federer has second set of twins, continuing secret plot to breed superior race of doubles teams. https://t.co/Q9kaAzEEN9

— Andrew Das (@AndrewDasNYT) May 6, 2014

Mr & Mrs Federer have boy twins to go with their girl twins. The future of tennis is basically called Federer

— Caroline Cheese (@CarolineCheese) May 6, 2014

Never mind the odds on having two sets of twins, what are the odds on an all Federer mixed doubles final at Wimbledon in 25 years?

— Russell Fuller (@russellcfuller) May 6, 2014

congrats to @rogerfederer #Mirka on the birth of #LEO and #Lenny the @Bryanbros @Bryanbrothers records could be in jeopardy!

— Justin Gimelstob (@justingimelstob) May 6, 2014

Fed works in multiples! Congrats to the Federer family. Very cool. 2 sets of twins.

— Darren Cahill (@darren_cahill) May 6, 2014

Since @rogerfederer likes the wwe, I'm thinking future tag team champs for his second set of twins. Congrats!

— John Isner (@JohnIsner) May 6, 2014

tennis anyone? roger federer with second set of doubles, names kids tennis and racket, mixed sports better watch out, grand slams for all

— Rembert Browne (@rembert) May 6, 2014

Leo & Lenny! #thefuture #twinsrule
👶👶✌️✌️⚡️⚡️🎾🎾🏆🏆🍼🍼

— . (@GoGalasGames) May 6, 2014