Reigning world's No.1 tennis player and 13-time Grand Slam champion Rafael Nadal has reportedly racked up millions of dollars after playing several exhibition events in South America for two weeks, a reliable source disclosed Thursday.

Nadal was reportedly $10 million richer after participating in exhibition games in Lima, Peru (vs. David Ferrer), Chile (vs. Novak Djokovic) and Buenos Aires, Argentina (against David Nalbanian and Djokovic).

By playing just four matches, the 27-year old Spaniard almost equalled the winnings he earned by playing in 82 matches and bagging 10 tournaments on the ATP Tour, including the French and U.S. Open championships.

"Nadal's $10M haul for playing four matches compares very favorably to what he earned by playing in 82 matches and winning 10 titles on the ATP Tour which awarded him just over $14.5M," Tom Gainey reported on Tennis X.

Before his South American stint, Mallorcan Bull also participated in a free exo for Virgin Company top honcho Richard Brunson in Necker Island.

Nadal Playing Golf

Last week, Nadal and Jose Maria Olazabal held a golf pro-am tournament called the Olazabal & Nadal Invitational Pro-Am. Being a true competitor, Nadal took the game seriously, even though it was just a charity event.

"This means that when I go out on the golf course with my friends everyday human feelings are put on hold. I have a phrase I use before a game to set the boundary between our enmity on the course and our affection off it. I look hard at my golfing pals and say: 'Hostile match, right?'I know they laugh at me behind my back about this, but I am not going to change," Nadal told the CBS Sports.

"I am decidedly unfriendly during a golf game, from the first hole to the last. It's true that you don't need the same intensity of concentration as in tennis, where, if your mind wanders for three or four minutes, you can lose three or four games," he added.

Nadal admitted that he's trying to be unfriendly in the heat of every match, adding he's looking up to 14-time Grand Slam champion Tiger Woods and his in-game demeanor.

"I take my cue from Tiger Woods. From start to finish, I barely say a word to my rivals; I certainly don't compliment them on a good shot. They complain, they get angry with me, curse me for my rudeness," Nadal added.