In a few countries around the world, kids are raised learning tennis on clay courts. That’s not the case in the United States or Canada, for example, as that’s largely a foreign substance to players from those countries. In Spain, though, clay courts are very popular.

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Perhaps that explains why Spain’s Rafael Nadal is easily the greatest clay-court player in tennis history and why he’s the +105 betting favorite to win a 12th French Open title. The only clay-court Grand Slam event begins May 26 at Roland Garros in Paris.

Last year, Nadal routed Austria’s Dominic Thiem 6-4, 6-3, 6-2 in the final for Nadal’s 11th French title. The southpaw became the first player in the Open era, male or female, to win the same Grand Slam tournament 11 times. Margaret Court won 11 Australian Open titles, but some of those were before the start of the Open era, which was 1968.