The Badminton World Federation (BWF) said Monday it was investigating a brawl at the Yonex Canada Grand Prix, which resulted in a Thai pair being disqualified.

Bodin Issara and his partner Pakkawat Vilailak were issued black cards, meaning disqualification, in the tournament's men's doubles final on Sunday after the former got into a fight with opponent Maneepong Jongjit.

Video footage showed Bodin chasing his ex-teammate Maneepong across the court before punching him.

Pakkawat and Maneepong's current partner, Nipitphon Puangpuapech, were not believed to be involved in the scrap.

Maneepong and Nipitphon were awarded the men's doubles title following their opponents' disqualification.

"The men's doubles final ended in unusual circumstances," BWF said in a statement.

"The events surrounding the conclusion of this match will be thoroughly investigated."

The Malaysia-based governing body said the matter would be referred to the disciplinary committee, adding the BWF "has procedures in place to deal with such situations".

Badminton was hit by scandal at the London Games last year when eight women's doubles players from South Korea, Indonesia and China were disqualified for trying to lose matches.

Following that the BWF announced changes to Olympic doubles rules to be introduced for the Rio Games in 2016 to "eliminate any player's thoughts about actively trying to lose a match or matches, irrespective of other match results".

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