Werder Bremen winger Melvyn Lorenzen attacked outside his home

The Bundesliga club released a statement on Sunday confirming the attack by unidentified individuals on the 21-year-old outside his own home, which left the winger with facial injuries.

Lorenzen was taken to hospital and has been told he will be unable to train for three weeks. His attackers escaped before the police arrived.

"Of course we are shocked by such an incident and we hope it gets resolved quickly," said Bremen's director of sport Frank Baumann. "We are going to give Melvyn our full support. We hope that he makes a full recovery from this incident very quickly and joins us back in the team."

Lorenzen, who was born in London and accepted a call-up from the Uganda national team in May, making his debut in a 2-0 friendly defeat to Zimbabwe, joined Bremen in 2013 from Holstein Kiel.

He made his first-team debut in October 2013 and has made 14 appearances for the Bundesliga outfit.