Tanja Ostertag

Tanja Ostertag (born 26 September 1987) is a German former professional tennis player.

A native of Stuttgart, Ostertag reached a career high ranking of 287 while competing on the professional tour.

Ostertag won two titles on the ITF Women's Circuit, both in Switzerland, and in 2006 had a win over world number 75 Kaia Kanepi at a tournament in Prostejov, which is the highest ranked opponent she defeated on tour.

In Quebec in 2006 she qualified for her only WTA Tour main draw, winning her first round match over Raluca Olaru at the Challenge Bell tournament, before being eliminated in the second round by Olga Puchkova.

ITF finals Legend $25,000 tournaments $10,000 tournaments

Singles: 4 (2–2) Outcome No. Date Tournament Surface Opponent ScoreRunner-up 1. 1 August 2004 ITF Bad Saulgau, Germany Clay Gréta Arn 4–6, 2–6Winner 1. 11 September 2005 ITF Vessy, Switzerland Clay Stéphanie Rizzi 6–4, 7–6(17)Runner-up 2. 28 October 2007 ITF Augusta, United States Hard Alisa Kleybanova 2–6, 1–6Winner 2. 20 June 2010 ITF Lenzerheide, Switzerland Clay Daria Salnikova 3–6, 7–6(7), 7–6(4)