Complex sentence: He won the Wimbledon boys' junior singles and doubles title in 1985 and was later a runner-up in doubles at Wimbledon in 1991 and a Wimbledon doubles semifinalist in 1989 and 1990.
Split into simpler sentences: He won the Wimbledon boys' junior singles and doubles title in 1985. He was later a runner-up in doubles at Wimbledon in 1991 and a Wimbledon doubles semifinalist in 1989 and 1990.