"My dear friends,
You've been with me through many tough and good times in my career. I've been blessed to travel the world, play the most beautiful sport that brings me a lot of excitement and joy; i am happy, loved and healthy. Jelena and I are truly blessed to soon become parents! My love is pregnant!"
This was just announced. There's a chance he will become a father during Aussie Open
Federer only announced on late December that Mirka is pregnant and Mirka is actually gonna give birth very soon, maybe she did already. It could the same case here, Jelena is probably pregnant for some time, but they just decided to announce it