Roger Federer is experiencing double vision again, but it's his wife who ended up in the hospital.

Is Mirka Federer's pregnancy the only barrier to Roger Federer's chances of winning the French Open?

Federer tweeted on Tuesday morning that his wife Mirka gave birth to twin boys, Leo and Lenny. The Federer family is now a party of six as the boys join 4-year-old twin sisters Charlene and Myla.

Obviously, Federer withdrew from the Madrid Open to be at the hospital with Mirka. Ever the class act, Federer apologized to his fans about leaving Madrid on his Facebook page, and he hinted he likely will miss next week's Rome Open as well.

"I've decided to withdraw from Madrid to be with my wife Mirka during these next few exciting weeks for our family," he wrote on Facebook. "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!"

Is Roger Federer afraid of the dark?

"Soon" likely means the French Open on May 25. Last month, speculation had circulated that Federer might miss the season's second Grand Slam, on the clay at Roland Garros, because of Mirka's pregnancy.

Now, Federer again looks to be one of the favorites at the event, despite the fact that he likely will get little practice time on the surface.

The adrenaline rush of a new set of twins could help Federer make up of a lack of preparation through the early rounds, and his major competitors standing between him and what would be an unprecedented 18th Grand Slam all have issues of their own.

No. 1 Rafael Nadal already has lost twice during the clay season in two tournaments he previously had dominated and has admitted having his confidence shaken by a combination of a back injury and his five-set finals loss to Stanislas Wawrinka in the finals of the Australian Open.

No. 2 Novak Djokovic already had withdrawn from Madrid with a right wrist injury that bothered him during his semifinals loss to Federer last month at the Monte Carlo Tennis Masters.

No. 3 Wawrinka, who beat Federer in the finals at Monte Carlo, inexplicably lost his opening match to Dominic Thiem 1-6, 6-2, 6-4 in Madrid.

Federer pretty much has lived a storybook life up to this point; another Grand Slam to bring home is not so far-fetched.

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