Tennis star Roger Federer and his wife, Mirka, have welcomed a second set of twins this week. He took to Facebook and Twitter to make the announcement on Tuesday.

“Mirka and I are so incredibly happy to share that Leo and Lenny were born this evening! Twins again.. miracle!” he wrote on Facebook, posting the same message on Twitter.

Federer and his wife also have twins Myla Rose and Charlene Riva, 4. The twin gene definitely runs in the family, as his older sister Diana has twins as well.

BBC Sport reports the 17-time Grand Slam champion will play the French Open, starting May 25. He pulled out of the Madrid Masters this week to be with his wife in Zurich when she gave birth to their new babies.

He wrote on Facebook, “I’ve decided to withdraw from Madrid to be with my wife Mirka during these next few exciting weeks for our family. I apologize to my fans and hope to be back in Madrid next year. I’ll be training near my home, and am excited to rejoin the Tour soon!”

The last time he played was at the Monte-Carlo Masters three weeks ago, when he lost to Stanislas Wawrinka.