|Country (sports)|| South Africa |
|Born||September 15, 1959|
|Height||6 ft 1 in (1.85 m)|
|Highest ranking||No. 87 (September 12, 1983)|
|Grand Slam Singles results|
|French Open||1R (1982, 1983, 1984)|
|US Open||2R (1983)|
|Highest ranking||No. 80 (January 3, 1983)|
|Grand Slam Doubles results|
|French Open||QF (1982)|
|US Open||2R (1987)|
While at Auburn University, Tarr played tennis in the Southeastern Conference and was the singles champion in 1981. In the same year he became Auburn's first ever All-American and would be selected a further two times.
Tarr twice made the second round of the singles draw in a Grand Slam tournament. He defeated Mike De Palmer at the 1983 US Open and beat Christophe Roger-Vasselin at the 1984 Wimbledon Championships. His best performance on tour came in the 1984 Cincinnati Open, part of the Grand Prix Tennis Championship Series, where he reached the round of 16. He registered upset wins over Tim Mayotte at Queen's in 1982 and Henri Leconte in the 1985 Madrid Tennis Grand Prix event.
He had more success on the doubles circuit, making the quarter-finals of the 1982 French Open, with Brad Guan. Tarr was also a Grand Prix semi-finalist twice, at South Orange Open in 1982 (partnering John James) and in Madrid three years later (partnering Marcos Hocevar). The best win of his doubles career came in 1983 at the Sovran Bank Classic, where he and Jonathan Canter upset top seeds Mark Edmondson and Sherwood Stewart, who had just won the French Open.
|1.||1982||Buchholz, West Germany||Hard||Mike Gandolfo|| Jiri Prucha
|2.||1985||West Palm, United States||Clay||Erik Van't Hof|| Leonardo Lavalle
|3.||1986||West Palm, United States||Clay||John Ross|| Ricky Brown
|4–6, 6–4, 6–4|