Karsten Braasch (born 14 July 1967) is a German former professional tennis player.
His highest ATP singles ranking was World No.
38, which he reached in June 1994.
His career-high in doubles was World No.
36, achieved in November 1997.
He was well-noted for his service motion and his habit of smoking during changeovers.
Braasch competed in a "Battle of the Sexes" contest against the Williams sisters (Venus and Serena) at the 1998 Australian Open when he was ranked 203.
Braasch was described by one journalist as "a man whose training regime centred around a pack of cigarettes and more than a couple bottles of ice cold lager".
He nonetheless defeated both sisters, playing a single set against each, beating Serena 6–1 and Venus 6–2.
Braasch was thirty years old at the time, while Venus and Serena were seventeen and sixteen, respectively.