Rafael Nadal

Rafael Nadal — King of Clay — is the target of young guns at French Open

It's an oft-cited and oft-updated stat in men's tennis: The so-called Big 4 — Roger Federer, Rafael Nadal, Novak Djokovic and Andy Murray — have won 47 of the past 52 Grand Slam titles, a run of dominance that began in 2005.

Add in Stan Wawrinka to make it a Big 5, and the number becomes 50 of 52.

And the frequently repeated accompanying questions are: How much longer can these guys continue to dominate the sport? When will a youngster — or several — step up? Maybe the French Open, which starts Sunday, will offer some insight.

“It's going to change at some point. But it does seem like the more you say it's going to change, Rafa and Roger are like, `Nope, I'm still...

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