Introduction
Peter Rennert (born December 26, 1958), is a former professional tennis player from the United States.
Rennert enjoyed most of his tennis success while playing doubles. During his career he won 2 doubles titles. He achieved career-high rankings of World No. 40 in singles (in 1980) and World No. 8 in doubles (in 1983). As a player, he trained with 25 time Davis Cup Championship Coach Harry Hopman and Wimbledon champion Tony Palafox. His best result as a singles player in a major was making it to the quarterfinals of the Australian Open twice. As a player at Stanford University, Rennert won three National Division 1 team titles and won College Player of the Year. At Stanford, he received a B.S. in Psychology.
Rennert now resides as a Physical Education teacher and Original Play teacher at a private school in Easton, Connecticut named Easton Country Day School or Phoenix Academy.
Doubles titles (2)
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents in the final | Score in the final |
|---|---|---|---|---|---|---|---|
| Runner-up | 1. | 1980 | Newport, U.S. | Grass |  Fritz Buehning |
 Andrew Pattison Butch Walts |
6–7, 4–6 |
| Runner-up | 2. | 1981 | Milan, Italy | Carpet | John McEnroe |
Brian Gottfried Raúl Ramírez |
6–7, 3–6 |
| Winner | 1. | 1982 | London/Queen's Club, U.K. | Grass | John McEnroe |
Victor Amaya Hank Pfister |
7–6, 7–5 |
| Winner | 2. | 1982 | Sydney Indoor, Australia | Hard (i) | John McEnroe |
Steve Denton Mark Edmondson |
6–3, 7–6 |
| Runner-up | 3. | 1982 | Tokyo Indoor, Japan | Carpet | John McEnroe |
Tim Gullikson Tom Gullikson |
4–6, 6–3, 6–7 |
| Runner-up | 4. | 1983 | Sydney Indoor, Australia | Hard (i) | John McEnroe |
 Mark Edmondson Sherwood Stewart |
2–6, 4–6 |