MUNICH, May 28 (Bundesliga) - Bayern Munich general manager Uli Hoeness has revealed the club are holding talks with Benfica goalkeeper Hans-Jorg Butt. The German champions are looking for a back-up to Michael Rensing, who is set to be first choice at the Allianz Arena next season following the retirement of Oliver Kahn. Hoeness told the Bild newspaper: 'Yes, we are holding talks with Hans-Jorg Butt.' Former Germany international Butt joined Benfica last year from Bayer Leverkusen after losing his place to Rene Adler, but has scarcely featured for the Portuguese giants. He is best known for taking penalties, having scored more than 20 times from the spot in the Bundesliga.