HAMBURG, Germany (AFP) - Hamburg will be without Dutch midfielder Romeo Castelen for at least three weeks after the 24-year-old tore his adductor muscle, the club announced on Thursday.

The Dutch international suffered the injury in Tuesday night's 3-0 win over Borussia Dortmund and will miss Saturday's Bundesliga clash with VfL Wolfsburg.

Hamburg coach Huub Stevens also has some concerns over the fitness of Peruvian striker Paolo Guerrero who is struggling with flu.

"I don't think he will be fit to play," said Stevens.