David Nainkin (born 20 September 1970) is a former professional tennis player from South Africa.

[1] Nainkin never reached a final on the ATP Tour but made it into the semi-finals of the 1995 Nokia Open in Beijing, before losing to Michael Chang.

This was despite Nainkin being ranked 215 in the world and having never previously won a Grand Slam match in five attempts.

The South African represented his country at the 1998 and 1999 Davis Cups.

[4] He now works for the United States Tennis Association and coaches top American players such as Mardy Fish, Sam Querrey and Sloane Stephens.