She won seven singles and seven doubles titles on the ITF Women's Circuit.

Lapko reached the 2014 US Open and 2015 Wimbledon girls' doubles finals, both times partnering Tereza Mihalíková.

[1][2] She won the 2016 Australian Open girls' singles title, defeating Mihalíková in the final.

In January 2024, she announced her retirement from tennis due to knee injuries.

[4] Only main-draw results in WTA Tour, Grand Slam tournaments, Fed Cup/Billie Jean King Cup and Olympic Games are included in win–loss records.