Mariana Simionescu
Mariana Simionescu is a retired tennis player from Romania.
Career
Simionescu won the French Junior Championships in 1974. She played on the WTA Tour from 1973 to 1980. Her best Grand Slam performance was reaching the fourth round at Wimbledon in 1977. She won one singles title and one doubles title. She reached a career-high singles ranking of world no. 36 in 1978.Simionescu married Björn Borg on 24 July 1980, but the marriage ended in 1984. She never remarried, but lived together with former F1 racer J.-L. Schlesser for a few years, with whom she has a son.
WTA Tour finals
Singles: 2 (1–1)
| Outcome | No. | Date | Tournament | Surface | Opponent | Score |
| Runner-up | 1. | 18 August 1975 | South Orange | Clay |  Virginia Ruzici | 6–1, 6–1 |
| Winner | 1. | 20 October 1980 | Tokyo | Hard |  Nerida Gregory | 6–4, 6–4 |
Doubles: 4 (1–3)
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents | Score |
| Runner-up | 1. | 11 November 1973 | :fr:Tournoi de tennis de Londres|London | Carpet | Virginia Ruzici |  Lesley Charles Glynis Coles | 6–3, 7–5 |
| Runner-up | 2. | 8 March 1976 | Tallahassee | Clay | Virginia Ruzici |  Julie Anthony Dianne Fromholtz | 6–2, 7–5 |
| Runner-up | 3. | 23 May 1976 | Rome | Clay | Virginia Ruzici |  Linky Boshoff Ilana Kloss | 6–1, 6–2 |
| Winner | 1. | 27 February 1978 | :fr:Tournoi de tennis de Fort Lauderdale|Fort Lauderdale | Clay | Lesley Hunt | Diane Desfor Barbara Hallquist | 1–6, 7–6, 6–3 |
Grand Slam singles tournament timeline
- Note: The Australian Open was held twice in 1977, in January and December.