HSV Hamburg have announced signing Dutch winger Romeo Castelen from Feyenoord in a 4-year deal worth 3million Euros. "We're delighted that Romeo has joined us and we're sure that he's going to strengthen us," Hamburg sporting director Dietmar Beiersdorfer told the club's official Web site on Monday. Castelen joins the Dutch exodus to the Bundesliga side, which already includes three players from Holland in the squad, in addition to Dutch coach Huub Stevens. The Dutch winger will join fellow internationals Rafael Van Der Vaart, Nigel De Jong and Joris Mathijsen. HSV are currently one match away from reaching the UEFA Cup next season, after they thrashed Moldova's Daciu Chisinau 4-0 to go through to the qualifying stage of the competition on Saturday.