Seattle Sounders coach Sigi Schmid admits they'll be wary of Ryan Smith when they face Kansas City Wizards this weekend.

The former Arsenal and Crystal Palace midfielder has made a big impact in the opening rounds of the season.

Schmid told the Seattle Times: "He has obviously been a good addition; probably comparable or similar to Zakuani in that he is a very dangerous left-sided player who sometimes doesn't look like he is moving that fast but he is very fluid and he is very quick. He is a very good crosser of the ball, finds people. He is obviously somebody that we have got to be concerned about. That's been a big addition for them."