During her professional career she was able to win a single and a double title of the ITF Women's Circuit .
For her country of birth, she took part in the 1996 Summer Olympics in singles and doubles in Atlanta . Only very shortly before the first round match in the individual, the originally drawn opponent withdrew her participation and was replaced by Virág Csurgó . For their part, she only had five minutes to appear on the pitch, ready to play. Olsza lost this encounter 2-6 and 5-7. In doubles she played alongside Magdalena Grzybowska . In the first round they lost against the French pairing Mary Pierce / Nathalie Tauziat with 2: 6, 6: 3 and 0: 6.
From 1996 to 1999 she played for the Polish Fed Cup team , for which she won 16 of her 25 games.
After an elbow injury in 2000, she ended her career.