Taiwo Awoniyi has picked up a muscle injury that could keep him out for several weeks.
Union Berlin will have to manage without Taiwo Awoniyi for the time being.
According to Kicker, the 23-year-old has sustained a thigh injury that is expected to keep him out for weeks.
"We fear he could be out for a while," Union chief Oliver Ruhnert told Kicker.
Awoniyi has scored five goals in 19 Bundesliga games this season.