Simplify the following text for a Grade 7 native English-speaking person.
Original: Nadal became the first player since Rod Laver in 1969 to win the French Open , Wimbledon , and the US Open all in the same calendar year , and became the first male player in history to win Grand Slams on clay , hard court and grass in the same calendar year .
Simplified: Nadal became the first player since Rod Laver in 1969 to win the French Open , Wimbledon , and the US Open all in the same calendar year .