The pair came to blows during the Champions league first round clash against Spartak Moscow.
Many managers send their teams onto the field with orders to "go out fighting".
But some players, like Bradford's Stuart McCall and Andy Myers, take this message a bit too far.
The duo came to blows during the Bantams' 6-1 demolition at the hands of Leeds United on Sunday.
Bradford captain McCall had to have stitches in a facial wound after Myers struck him just before half-time at Elland Road.
McCall then seemed to aim a head-butt at the central defender, but fortunately it missed.
Here are some other famous examples of team-mates showing hate.
Derek Hales and Mike Flanagan, January 1979
The creme de la creme of inter-team fights.
The Charlton strike partners were sent-off for brawling during an FA Cup third round tie against Maidstone at The Valley.
With five minutes to go and the game level at 1-1, Flanagan played a ball through to Hales.
Hales was ruled offside and was furious as he had wanted the ball played a lot earlier.
Flanagan, who had scored Charlton's equaliser minutes earlier, said he had been doing that all season but Hales had not been taking advantage.
The players started fighting and were sent-off by referee Brian Martin.
Graeme Le Saux and David Batty, November 1995
You could scarcely find two more different footballers than Guardian-reading Le Saux and gritty Yorkshireman Batty.
The pair came to blows during the Champions league first round clash against Spartak Moscow.
Le Saux took the ball off Batty, but miscontrolled it and put the ball out for a throw-in. Batty berated Le Saux, who responded by throwing a punch at him.
He must have made quite a good contact, because he had to be substituted in the 57th minute because of a hand injury.
Steve McManaman and Bruce Grobbelaar, September 1993
Eccentric keeper Grobbelaar was indignant when McManaman hit a weak clearance that gifted Everton the lead in the Merseyside derby.
Grobbelaar, one of the Anfield side's most experienced players at the time, castigated the young winger, who responded by yelling back at him.
This was like a red rag to a bull and Grobbelaar grabbed his team-mate by the throat and pushed him away.
McManaman, hardly the most intimidating of footballers, wisely decided that enough was enough and swiftly walked away.
Stan Collymore and Trevor Benjamin, October 2000
Collymore seems to have had an uncanny ability to fall out with his team-mates throughout his career.
And during his time at Leicester he actually came to blows with one of them - his fellow striker Benjamin.
The pair started arguing during the first half of a reserve team game against Charlton and took their disagreement into the dressing room.
The row became so heated that they actually came to blows and Collymore refused to come out for the second-half
The incident hastened Collymore's departure from Filbert Street.