Which Grand Slam tennis tournament is played on a clay court?

A clay court is a tennis court that has a playing surface made of crushed stone, brick, shale, or other unbound mineral aggregate. The French Open uses clay courts, the only Grand Slam tournament to do so. Clay courts are more common in Continental Europe and Latin America than in North America, Asia-Pacific or Britain.

Clay courts are considered "slow" because the balls bounce relatively high and lose much of their initial speed when contacting the surface, making it more difficult for a player to deliver an unreturnable shot. Points are usually longer as there are fewer winners. Therefore, clay courts heavily favor baseliners who are consistent and have a strong defensive game.

The French Open is played in Paris, France. It was first held in 1891, and it usually runs for 2 weeks from the end of May to early June.

The Wimbledon, the oldest of the Grand Slam tournaments, is played in England on a grass court.

Both the US Open and the Australian Open are played on hard courts. They are played in New York, NY and Melbourne, respectively.