Frei has started every match against the Blues this season.
"I never imagined at the start of the season that I'd play against Chelsea three times!" Kerim told fulhamfc.com. "Even in the first game when I played in the Carling Cup I didn't think I was going to play so that was my first big game.
"As I'd played against them twice before I was quite confident going into Monday's game and I thought we did very well as a Team."