Juan Martin del Potro edged Roger Federer to capture his first career Masters title in Indian Wells on Sunday.

The 29-year-old Argentine joined Paris champion Jack Sock as a rare non-European winner of a Masters crown.

Watch: What We Learned from Indian Wells

Sixty-three of the last 65 Masters 1000 champions have been Europeans.

World No. 1 Roger Federer says red clay training may well be one reason for Europe's dominance of the ATP Masters Series.

"It's true Europe has been on an absolute tear the last 10 years or so. It's been pretty incredible," Federer said at a press conference to promote the Laver Cup coming to Chicago in September. "I wonder if it's us being brought up on the clay or not, because I think that's a good base to start off with, I'm not sure about that, but I wouldn't be surprised if it changes a little bit. I would be surprised if it changes completely right away, because Team Europe is just so, so strong."



Federer said non-European players, including Australian Nick Kyrgios, del Potro and Sock can rack up Masters titles in the future.



"But anything is possible. And then when someone like Nick (Kyrgios) starts maybe dominating or others start doing the same, in tennis you can start racking up a lot of titles, two, three slams a year, or you can win four, five Masters 1000s," Federer said. "We have seen Novak do it, Rafa do it, myself do it. I think it would be nice if someone away from Europe could start having an impact like that."

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