In October 2004, Kilsdonk partnered Leanne Baker and the duo lost in the semifinals of the Luxembourg Open.

[2] In February 2005, Kilsdonk partnered Claire Curran and the duo lost in the first round of the Open Gaz de France.

There, they won two matches to qualify and then went on to beat Francesca Lubiani and Marta Marrero in the first round.

[3] This was followed by a run to the semifinals at the İstanbul Cup partnering Claire Curran where they lost to Sandra and Daniela Klemenschits.

[5] In September 2007, Kilsdonk partnered Sophie Lefèvre and the duo lost in the quarterfinals of the Guangzhou International Open to Anabel Medina Garrigues and Virginia Ruano Pascual.