Hlaváčová was a Czech national team member in long-distance
swimming and won a
silver medal at the
1991 European Aquatics Championships in the 5 km open water and a
bronze medal at the
1995 European Aquatics Championships in the 25 km open water event. Despite being of Czech nationality she won the
50 metres butterfly title in 1998 at the
ASA National British Championships. She broke the Czech record for swimming the
English Channel in 2005, completing the journey in 8 hours and 42 minutes. She later completed the crossing in a time of 7 hours, 25 minutes, setting the women's
world record in the process. While she has pursued indoor swimming, she has earned much more success on the open water. The swimmer has been at the top of long-distance swimming for several years. At , she is one of the tallest swimmers in the world. Her feet are a size 13 (US) / 46 (EU). ==Successful English Channel Swims==