BERLIN, Jan 18 (Reuters) - Bayer Leverkusen will be without first-choice keeper Mark Flekken and forward Nathan Tella for several weeks after they sustained injuries in Saturday's 1-0 loss to Hoffenheim, the Bundesliga club said on Sunday.
Flekken, the Dutch international keeper, suffered a knee ligament injury while Nigeria international Tella, who had come on as a substitute, picked up a foot injury.
"Both players will not be available for a longer period of time," the club said.
Leverkusen, who take on Olympiacos in the Champions League on Tuesday, are sixth in the Bundesliga standings.
(Reporting by Karolos Grohmann, editing by Ed Osmond)
