Slegers played as a midfielder, representing Willem II, as well as Swedish Damallsvenskan clubs Djurgårdens IF and Linköpings FC.

[3] She subsequently spent time on the books of Arsenal from 2006 to 2007, before returning to her home country to launch her senior career with Willem II.

A serious knee injury sustained in November 2016 eventually brought about the end of Slegers' playing career and she was forced to announce her retirement in February 2018.

In June 2013, national team coach Roger Reijners selected Slegers in the Netherlands squad for UEFA Women's Euro 2013 in Sweden.

[12] Under Slegers, Arsenal went unbeaten in eleven matches, and qualified for the quarter-finals of the Women's Champions League, by finishing at the top of their group.