Wolfsburg striker Grafite has accused coach Armin Veh of being disrespectful by taking him off in the 52nd minute of their 1-1 draw with Bochum on Saturday.
The Brazilian, who was voted Germany's Footballer of the Year last season, was replaced by Obafemi Martins early in the second half and he spoke afterwards of his disillusionment at not being given more of a chance to score.
He said: "This is the fifth game in which I have been substituted and it happened as early as the 52nd minute. Five minutes in the second half is too little. I am not a young boy any more. I have a history at this club and deserve a bit more respect.''
Veh later hit back at last season's 28-goal hero, claiming his current form is simply not up to scratch and that he should be grateful to have got so much time on the field.
"I keep picking him even though he is not playing well,'' said Veh. "If he really has said that, then he will have a problem. The coach does the talking here, not the players.''
Veh was perhaps right to be angry with Grafite and his strikers for once again missing a hatful of chances to only come away with a point from the league's strugglers.
"We have dropped two points here,'' concluded Veh. "We had five or six gilt-edged chances in the final phase of the game and we unfortunately did not take any of them. I am happy with our performance, but not with the result.''
The draw nevertheless kept Wolfsburg ahead of Bayern Munich in sixth position, although they remain seven points behind league leaders Bayer Leverkusen.