Bayer Leverkusen keeper Rene Adler will be sidelined for up to three weeks with a hand trouble, the club said. Adler, seen as the best keeper in the Bundesliga after the first-half of the season, suffers an injury in his forefinger. Benedikt Fernandez or Erik Domaschke will be standing under the crossbar against Zurich in the UEFA Cup on Thursday. Bayer have already qualified for the round of 32 of the tournament.