Franz Beckenbauer says that he must learn to control his temper . He says if the Frenchman does not keep his cool , it could cost his team - mates . he expressed a similar concern over ng Boateng . Meanwhile , he has heaped praise on to Bayern head coach Pep Guardiola . Guardiola 's contract at sporting is set to expire next season .
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 .