[1] Tzavella won a bronze medal in the 200 m individual medley at the 2003 European Junior Swimming Championships in Glasgow, Scotland with a time of 2:16.35, 0.11 of a second behind her teammate Vasiliki Angelopoulou.

[2] Having reached a B-standard entry time by FINA, Tzavella earned a spot on the Greek team for the Olympics.

[3] Tzavella represented the host nation Greece, as a 16-year-old, at the 2004 Summer Olympics in Athens, competing in two swimming events.

She finished only in seventh place for her heat and twenty-third overall by less than 0.22 of a second behind Malaysia's Siow Yi Ting with a time of 2:20.30.

[4] In her second event, 200 m breaststroke, Tzavella recorded a slowest time of 2:40.18 on the same heat, finishing thirty-first overall in the preliminaries.