820 ILCS 90/25

In addition to any remedies available under any agreement between an employer and an employee or under any other statute, in a civil action or arbitration filed by an employer (including, but not limited to, a complaint or counterclaim), if an employee prevails on a claim to enforce a covenant not to compete or a covenant not to solicit, the employee shall recover from the employer all costs and all reasonable attorney's fees regarding such claim to enforce a covenant not to compete or a covenant not to solicit, and the court or arbitrator may award appropriate relief.