Lefèvre started playing tennis at the age of five. From 1998 she played on the professional tour, where she won a total of four ITF titles in doubles. At the Australian Open she achieved the best result in a Grand Slam tournament in 2011 when she moved into the second round of the doubles competition .
In recent years Lefèvre has specialized in doubles, mostly with Marija Kondratjewa . In 2009 she was able to advance to the second round at the WTA tournament in Memphis with Kondratjewa.
Lefèvre has not played a professional tournament since October 2012 and has not been in the world rankings since 2013.