Tammi Patterson (born 3 January 1990) is an Australian former professional tennis player. Patterson has won one singles title and ten doubles titles on the ITF Circuit. On 21 February 2011, she reached a career-high singles ranking of world No. 289. On 23 October 2017, she peaked at No. 215 in the doubles rankings. Patterson made her Grand Slam debut at the 2016 Australian Open as a wildcard entry. She lost against former world No. 1, Ana Ivanovic, in the first round in straight sets, winning just five games and not being able to force a break point.