Merab Dvalishvili's Jacuzzi gag has backfired against Petr Yan ahead of UFC 323. 'The Machine' jokingly invited the Russian to join him for an R&R hot tub session after their upcoming fight, but his rival's vicious retort left him speechless.The gag traces back to UFC 311 when he poked fun at opponent Umar Nurmagomedov over a photo of his teammates Khabib Nurmagomedov and Islam Makhachev sharing a hot tub with several other men.Since then, 'The Machine' has kept it as an ongoing joke. Dvalishvili even shared a hot tub session with Sean O'Malley at the UFC Performance Institute, adding an extra layer of irony to the ongoing gag.However, as he tried to use the joke in the lead-up to UFC 323, it brutally backfired. Responding to Dvalishvili's offer, Yan said:"You have plenty of people in your Jacuzzi; I don't have to be there. I feel like you should have girls in your Jacuzzi instead of who you have. If you like to be in the Jacuzzi with the boys, it's up to you."When 'The Machine' tried to argue it doesn't matter who he had in his Jacuzzi, and he could always have a mixed crowd, Yan doubled down, claiming:"All I saw is all you got is boys in yours. Honestly, I haven't even seen you with a girl before at all."With the crowd erupting in laughter at Yan's comments, Dvalishvili made little effort to come up with a response and just joined in.Check out Merab Dvalishvili and Petr Yan's comments below:Merab Dvalishvili slams Petr Yan's excuse for defeat in their first fightMerab Dvalishvili isn't happy with Petr Yan coming up with excuses for his defeat in their first fight. As the former bantamweight champion claimed that he went into UFC Fight Night 221 with an injured hand, 'The Machine' viciously clapped back.During the pre-fight presser, Dvalishvili argued that Yan knew better than to make such excuses, while posing a spine-chilling question about their upcoming UFC 323 showdown:"Petr, you are better than this, bro. Stop making excuses, no excuse. On Dec. 6, what excuse are you going to make? Tell me now, are you going to make excuses when I beat you again? Tell me now?"