Marta Domachowska (Polish pronunciation: [ˈmarta dɔmaˈxɔfska]; born 16 January 1986) is a former tennis player from Poland.

Domachowska was the best female Polish tennis player after Magdalena Grzybowska's retirement and before Agnieszka Radwańska's successes.

Marta started playing tennis at age seven,[1] and reached the semifinals of the Australian Open Junior Championships in 2003.

In her sole appearance at a WTA Tour tournament in 2001, as an unranked wildcard in Sopot qualifying, she lost in the first round.

She was runner-up in the Tier-III tournament in Strasbourg and reached the semifinals in Beijing, a Tier II event.

She and Sania Mirza finished runner-up in Cincinnati, and with Marion Bartoli, reached the semifinals in Stanford.

But she failed to advance past the first round in all four majors, and withdrew at Charleston, and Bali due to injuries.

In the 2008 Australian Open, she achieved her best grand slam result, reaching the fourth round, before she lost to Venus Williams.

Domachowska also represented Poland in the singles draw at the 2008 Summer Olympics in Beijing, where she lost in the first round.

[1] In 2009 in singles, she lost in the first round of all four Grand Slam tournaments, including the US Open as a qualifier.

[citation needed] In late 2021, it was announced by the International Tennis Federation that Domachowska would be eligible to compete again from January 2022.

[3] Marta was born to Barbara and Wiesław and currently resides in Podkowa Leśna, Poland.

[4] They announced her first pregnancy on 24 December 2018 via Instagram, and she gave birth to their son Filip Janowicz on 1 January 2019.