Marc C. Flur (born June 8, 1962) is a former professional tennis player from the United States.

A member of the Duke Hall of Fame, he is considered to be the greatest tennis player in the school's history.

In 1983 he won both All-American selection and the ACC Player of the Year award.

[4] The only other time he made it past the first round was in the 1987 US Open, where he defeated Christian Saceanu in five sets.

[4] At the US Open the following year, he had his best doubles result, making the third round, with partner Sammy Giammalva, Jr.[4] Two years earlier, the pair had been runners-up in the Livingston Open, the only Grand Prix final that Flur would ever play in.