Kathleen Blake (born December 18, 1946) is an American former professional tennis player. Blake, a California native, won the USTA Under-16s national hardcourt championships in 1962. Before the introduction of tiebreaks, she held the record for playing the longest match in women's professional tennis, with a 12-10, 6-8, 14-12 win over Elena Subirats at Piping Rock in 1966. Blake's best national ranking was 11th. Married to tennis coach Wayne Bryan since 1973, Blake is the mother of identical twin doubles players the Bryan brothers (Bob and Mike).