Ken Flach, who won four Grand Slam titles in men’s doubles and two in mixed doubles, died on Monday in California. He was 54.
The ATP World Tour, which represents men’s professional tennis, announced his death. His wife, Christina, said on Facebook that he had had pneumonia.
Flach and Robert Seguso formed one of the top teams of the 1980s, reaching No. 1 in the men’s doubles rankings in 1985. They won 28 titles together, including championships at the United States Open in 1985 and at Wimbledon in 1987 and 1988. They were the runners-up at the Open twice. They also collected a gold medal for the United States at the 1988 Olympics in Seoul, South Korea.
The two men’s partnership began in college. They played together at Southern Illinois University at Edwardsville and won three Division II national championships.
Flach finished his career with a total of 34 men’s doubles titles, including a victory at the 1993 U.S. Open with Rick Leach. His Grand Slam mixed doubles trophies came with Kathy Jordan at the French Open and Wimbledon in 1986.
He also played doubles on the United States Davis Cup team from 1985 to 1991, compiling an 11-2 record.