UFC welterweight Michael Chiesa believes Petr Yan will do just fine without a cornerman for his upcoming fight against Aljamain Sterling at UFC 273.Ahead of the pay-per-view, Chiesa spoke to Paul Felder on the UFC Round-Up show. At one point during their interaction, the welterweight contender talked about the bantamweight title unification match that is going to take place on April 9.Yan's coaches were denied US visas for the fight. Commenting on the situation, 'The Maverick' stated that 'No Mercy' does not need people in his corner to defeat Aljamain Sterling:"The only thing that I think could really play against [Petr Yan] right now is this cornering situation because I know he had visa issues with one of his cornermen... I think the man could go in there and fight without a cornerman and be just fine. I think he's that good. I think the guy could go into the octagon and just as long as somebody could throw a water bottle over the fence so that he could get a little swig, I'm sure he'd be fine without a cornerman. He's an assassin."You can watch the full episode of the UFC Round-Up show below:Henry Cejudo and Sean O'Malley pull back their offers to be in Petr Yan's cornerWhen news broke of Yan's cornermen being denied entry into the United States, Sean O'Malley and Henry Cejudo offered to help the Russian in his fight.Petr “No Mercy” Yan@PetrYanUFCHey coach @HenryCejudo what are your plans on April 9th? twitter.com/FightScoutApp/…Fight Scout@FightScoutAppPetr Yan was forced to leave without his cornermen for UFC 273, no news yet on who they will be replaced with.Check us out at fightscout.app11:51 AM · Mar 17, 20228902454Petr Yan was forced to leave without his cornermen for UFC 273, no news yet on who they will be replaced with.Check us out at fightscout.app https://t.co/Y4q4Krt9RiHey coach @HenryCejudo what are your plans on April 9th? twitter.com/FightScoutApp/…Henry Cejudo@HenryCejudo“Get me a booster seat and I’ll work your corner…you kneed me” #andnew twitter.com/PetrYanUFC/sta…Petr “No Mercy” Yan@PetrYanUFCHey coach @HenryCejudo what are your plans on April 9th? twitter.com/FightScoutApp/…9:25 AM · Mar 17, 20226483284Hey coach @HenryCejudo what are your plans on April 9th? twitter.com/FightScoutApp/…“Get me a booster seat and I’ll work your corner…you kneed me” #andnew 🇷🇺🇷🇺🇷🇺 twitter.com/PetrYanUFC/sta…Petr “No Mercy” Yan@PetrYanUFCOne corner spot is taken by @SugaSeanMMA 9:02 AM · Mar 17, 202216047977One corner spot is taken by @SugaSeanMMA 🐩 https://t.co/rW5bJNRZItHowever, Petr Yan's recent comments during his appearance on Ariel Helwani's show, The MMA Hour, did not sit well with 'The Messenger' and O'Malley. Both have withdrawn their offers to be in Yan's corner.MMAFighting.com@MMAFightingPetr Yan doubles down on his star-studded corner, but doesn't want "sh*tty advice" #TheMMAHour youtu.be/6XykbxRDFhA1:02 AM · Apr 5, 20224544253Petr Yan doubles down on his star-studded corner, but doesn't want "sh*tty advice" 😅 #TheMMAHour ▶️ youtu.be/6XykbxRDFhA https://t.co/WIjT0GiBvYHenry Cejudo@HenryCejudoSorry buddy I ain’t nobody’s Waterboy! Between your knees and O’Malley’s steroids…it’s just too much illegal activity for me to be involved in. #bendthekneepotatoface 🥔🥔🥔@PetrYanUFC twitter.com/mmafighting/st…MMAFighting.com@MMAFightingPetr Yan doubles down on his star-studded corner, but doesn't want "sh*tty advice" #TheMMAHour youtu.be/6XykbxRDFhA6:11 AM · Apr 5, 2022219869Petr Yan doubles down on his star-studded corner, but doesn't want "sh*tty advice" 😅 #TheMMAHour ▶️ youtu.be/6XykbxRDFhA https://t.co/WIjT0GiBvYSorry buddy I ain’t nobody’s Waterboy! Between your knees and O’Malley’s steroids…it’s just too much illegal activity for me to be involved in. #bendthekneepotatoface 🥔🥔🥔@PetrYanUFC twitter.com/mmafighting/st…While Cejudo responded to Yan's comments via Twitter, O'Malley pulled out his support during the TimboSugarShow podcast:"I wouldn't corner that f*****g... I don't care if he wins."Watch the full episode of the TimboSugarShow podcast below:The first fight between 'No Mercy' and Sterling ended in a disqualification win for 'Funk Master'. Yan hit Sterling with an illegal knee in the fourth round, handing the then-challenger the bantamweight belt.The Russian went on to win the interim title against Cory Sandhagen. Now, both he and Sterling will look to unify the bantamweight title at UFC 273.