MTO EXCLUSIVE: It's Going DOWN . . . Kevin Durant's BROTHER . . . Is Fighting Russell Westbrooks WIFE . . . On TWITTER!!

Last night, Kevin Durant's brother Tony went OFF - and started throwing major shade at Kevin's former teammate Russell Westbrook. He has snce deleted the tweets, but here's what he wrote:

Russell's wife Nina responded:

and it seems like you are chasing the hell out of some attention. You got it. ??

— Nina Westbrook (@ninaamarie_w) March 17, 2017

">

She's not afraid to RIDE FOR HER HUSBAND!!