Karsten Braasch (born 14 July 1967) is a German former professional tennis player.

He reached the second round, before losing to ninth seed Brett Custer in straight sets.

He played solely on the ATP Challenger Tour for the beginning of his career with moderate results.

He recorded his first ATP main draw win two months later in his second tournament at the Hall of Fame Open where he defeated Luiz Mattar in the first round in straight sets.

Soon after, he made his Grand Slam debut at the 1992 French Open where he lost in the first round to world No.

He won his first Grand Slam match at 1992 Wimbledon where he defeated Diego Nargiso in five sets.

He then qualified for the 1997 Australian Open and reached the third round to match his best result at a Grand Slam and defeating 12th seed Magnus Gustafsson en route.

[3] 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".

[4] He nonetheless defeated both sisters, playing a single set against each, beating Serena 6–1 and Venus 6–2.

[5] Braasch was thirty years old at the time, while Venus and Serena were seventeen and sixteen, respectively.