Bayern Munich winger Arjen Robben has claimed that too much harmony can sometimes have a negative impact on a team.
The Bavarian giants have started the season with a 100 per cent record, registering five straight wins in the Bundesliga and opening their Champions League campaign with a victory over Valencia.
Yet despite their exploits in bagging maximum points thus far, Robben warned his team-mates not to go overboard with the feel-good factor in the dressing room and not hold back in making their feelings known.
"It is important that it sometimes there are clashes between team-mates," he told Sport 1. "We need eachother to tell the truth, and this is not always a positive.
"Ribery made a mistake last year; he apologised, and life goes on. I have forgiven him."
Jupp Heynckes' side will look to extend their winning streak to seven when they entertain Werder Bremen on Saturday.