Ranked 9th in qualifying group B, she advanced to the short program, where she placed 15th, allowing her to compete in the final segment.

Concluding her season, she progressed past the qualifying round at the 2001 World Championship in Vancouver, British Columbia, Canada, but was eliminated after placing 27th in the short program.

In 2003–04,[11] Naiden Borichev began coaching Vassileva in Sofia, while continuing his competitive career in men's singles.

[12] Vassileva made no competitive appearances because of maternity reasons during the following seasons until October 2015, when she returned and competed at the 2015 Denkova-Staviski Cup in Sofia.

In 2016, Vassileva began training with Kent Johnson at Kendall Ice Arena in Miami, Florida.

[15] In January 2017, Vassileva attended at European Figure Skating Championship in Ostrava, Czech Republic.

CS: Challenger Series; JGP: Junior Grand Prix Media related to Hristina Vassileva at Wikimedia Commons