Seattle Sounders goalkeeper Kasey Keller is wary coming up against Chicago Fire with Frank Klopas in charge.

Klopas will be marking his coaching debut for the game.

Keller told the Seattle Times: "I played with Frank with the national team for years, but I have no idea what he's going to do as a coach.

"I like Frank. We've gotten along really well over the years. If he's the guy, then I wish him the best of luck after Saturday."

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