Conor McGregor's return to the octagon will come against Michael Chandler later this year. A date for the bout has not been announced, however, as the former double champ reportedly remains out of the United States Anti-Doping Agency (USADA) testing pool. 'The Notorious' recently shared a video of his mother on Twitter that led fans to speculate that cocaine usage may be a cause for this.Check out Conor McGregor's video below:Conor McGregor@TheNotoriousMMA386486https://t.co/SVSkiIrCNvScreenshots from Conor McGregor's videoFans took to Twitter to accuse McGregor of drug use. @deelow78 cited it as the reason he isn't in the USADA pool, stating:"No wonder dude isnt in the USADA POOL 😂😂😂😂😂😂😂😂😂"@LLivshitz questioned whether there was white powder on the mirror:"Is it me, or is it look like a white powder leftovers on the green mirror near the ipad"@sharon_tolmie noticed the powder as well:"There's some Coke dust next to I -Pad on green mirror 🐐 🏆"@BrettLeveque disagreed with the notion that the substance was cocaine:"That’s a kids tablet not a mirror. Those are finger prints from greasy kid fingers."@lividcuh pointed out that McGregor does not appear to be training for a fight:"nice to see you training for chandler!"@Ifcelliot and @abdulelisk had similar reactions:"Are you going to train anytime soon?""Proper training camp"@CabbageReloaded claimed the former double champ would never win again:"You're never winning another fight."@JuxtOvReality had a similar thought:"Shouldn’t you be training for a fight? Don’t lose or its game over."Check out the best fan reactions to the video below:iggy@deelow78@TheNotoriousMMA No wonder dude isnt in the USADA POOL @TheNotoriousMMA No wonder dude isnt in the USADA POOL 😂😂😂😂😂😂😂😂😂Lenny Livshitz@LLivshitz@TheNotoriousMMA Is it me, or is it look like a white powder leftovers on the green mirror near the ipad2@TheNotoriousMMA Is it me, or is it look like a white powder leftovers on the green mirror near the ipadNolan wrestling@sharon_tolmie@TheNotoriousMMA There's some Coke dust next to I -Pad on green mirror 5@TheNotoriousMMA There's some Coke dust next to I -Pad on green mirror 🐐 🏆Brett@BrettLeveque@sharon_tolmie @TheNotoriousMMA That’s a kids tablet not a mirror. Those are finger prints from greasy kid fingers.@sharon_tolmie @TheNotoriousMMA That’s a kids tablet not a mirror. Those are finger prints from greasy kid fingers.livid@lividcuh@TheNotoriousMMA nice to see you training for chandler!1@TheNotoriousMMA nice to see you training for chandler!Elliot@Ifcelliot@TheNotoriousMMA Are you going to train anytime soon?@TheNotoriousMMA Are you going to train anytime soon?Abdul@abdulelisk@TheNotoriousMMA Proper training camp1@TheNotoriousMMA Proper training campCharlie@CabbageReloaded@TheNotoriousMMA You're never winning another fight.1@TheNotoriousMMA You're never winning another fight.JuxtapositionOvReality@JuxtOvReality@TheNotoriousMMA Shouldn’t you be training for a fight? Don’t lose or its game over.@TheNotoriousMMA Shouldn’t you be training for a fight? Don’t lose or its game over.Conor McGregor's return: 'The Notorious' shares plans for Michael Chandler boutConor McGregor will face Michael Chandler in his highly-anticipated return to the octagon. While the bout is without a date, 'The Notorious' revealed his plans while speaking with Megan Olivi, stating:"I'm going to kick this guy in the head. He's just tailor-made for being kicked all over the place and that's what I'm aiming for. I'm aiming to wrap this steel bar around the opponent and you're going to see a visual of the leg hanging off and then you're going to see a visual of a head hanging off. I'm excited for that and I'm motivated for that. Steady making my way towards it."Catch Conor McGregor's comments on Michael Chandler below (3:40) :