Karl-Heinz Rummenigge was left incensed by the reception Mats Hummels received from Borussia Dortmund fans in the DFL-Supercup.
Bayern Munich chairman Karl-Heinz Rummenigge slammed Borussia Dortmund fans for their "ingratitude" toward Mats Hummels during the DFL-Supercup on Sunday.
Hummels made his competitive debut for Bayern in a 2-0 victory over his old club, with goals from Arturo Vidal and Thomas Muller sealing the win for the Bundesliga champions.
Germany international Hummels was booed with every touch of the ball by large sections of the crowd at Signal Iduna Park, many of whom have not forgiven him for leaving Dortmund for its title rivals in July.