Franz Beckenbauer says Franck Ribery must learn to control his temper . He says if the Frenchman does not keep his cool , it could cost his team-mates . Beckenbauer expressed a similar concern over Jerome Boateng . Bayern Munich coach Pep Guardiola has been criticised for saying that he would like to see more of Ribery, who was sent off against Borussia Dortmund in last weekend's Champions League semi-final first leg at Allianz Guardiola 's contract at Bayern is set to expire next year .
Franz Beckenbauer says Franck Ribery must learn to control his temper . He says if the Frenchman does not keep his cool , it could cost his team-mates . Beckenbauer expressed a similar concern over Jerome Boateng . Meanwhile , he has heaped praise on to Bayern head coach Pep Guardiola . Guardiola 's contract at Bayern is set to expire next year .