Rottier was born in Sint-Niklaas and grew up in Stekene in Belgium, near the border with the Netherlands. When she was three years old, her family moved right across the border to Sint Jansteen. At the age of seven, she joined a local tennis club. In 1990, at age 16, she moved to Amsterdam to join a tennis academy. That year, she won the national juniors title and in 1992 she became national champion.
Rottier broke through in 1993, reaching the final in Tokyo, which she lost to Kimiko Date in straight sets. She also reached the semifinals in Indian Wells and the fourth round in Key Biscayne. Through these results, she rose to 30th place on the rankings, making her the highest placed Dutch female player at the time.
A year later, she reached the second round of the 1994 French Open. She reached the final of the WTA doubles tournament in Beijing in 1995 partnering Wang Shi-ting, and losing to Claudia Porwik and Linda Wild, also in straight sets.
After 1994, Rottier sustained injuries to her arm, shoulder, elbow, leg and ankle. She missed a lot of matches and gradually fell out of the top 100 of the rankings. However, she did manage to win an ITF Tour tournament in Seoul in 1996.
In 1998, at age 24, Rottier was forced to retire from professional tennis.
Netherlands
Kimiko Date
Wang Shi-ting
Claudia Porwik
Linda Wild
Silvia Ramón-Cortés
Anne-Gaëlle Sidot
Gabriela Chmelinová
Natalia Chasovaya 
Anna Linkova
Karin Kschwendt 
