The youngest player to win a men's singles Grand Slam title in the Open Era is Michael Chang of the United States. He won the French Open in 1989 at the age of 17 years and 3 months. He defeated Stefan Edberg in the final in a five-set match that lasted over four hours. Chang's victory at the French Open made him the youngest male player to win a Grand Slam singles title, a record that still stands today.