Pieter Aldrich (Born September 7, 1965, in Johannesburg, South Africa) is a former professional tennis player from South Africa. A doubles specialist, he won 2 Grand Slam men's doubles titles (1 Australian Open and 1 US Open). Aldrich reached the World No. 1 doubles ranking in 1990.
Aldrich won the first of 9 career doubles titles in 1988 at Charleston, South Carolina.
In 1990 Aldrich won the men's doubles titles at both the Australian Open and the US Open, partnering his fellow South African player Danie Visser. The pair were also doubles runners-up at Wimbledon that year.
1990 also saw Aldrich win his first (and only) top-level singles title at Newport, Rhode Island. His career-high ranking in singles was World No. 64, which he achieved in 1988.
Aldrich won the final doubles title of his career in 1992 in Johannesburg.