Nine years ago, Renan Barao lost his professional debut at a local show in Natal, Brazil. Since then he has only compiled one of the most impressive standing streaks in modern mixed martial arts, rolling through 31 straight fights unbeaten. Saturday night was no exception. Utilizing a rangy and explosive attack, Barao dismantled 22-year-old wunderkind Michael McDonald en route to a fourth-round submission victory at UFC on FUEL TV 7, adding an air of legitimacy to his UFC interim bantamweight strap and rocketing interest in his eventually clash with sidelined champion Dominick Cruz. The volatile title tilt served as a fitting capper for an English crowd already buzzing after featherweight contenders Cub Swanson and Dustin Poirier set London’s Wembley Arena on fire with the pair’s thrilling co-main event. And as always, a flood of professional fighters were right there to commentate along with the action. Congrats @renanbaraoufc nice dance!! ”” Urijah Faber (@UrijahFaber) February 16, 2013 not expecting that record to stick around too [email protected]: congratulations @jonnybones u r still the youngest champion in @ufc history. ”” Jon Bones Jones (@JonnyBones) February 16, 2013 I’m sure there’s some pretty sick young dudes out there waiting @bombogkush_: @jonnybonesWhat makes you say that? ”” Jon Bones Jones (@JonnyBones) February 16, 2013 I WANT TO FIGHT BARAO!!! Please?? =) ”” Eddie Wineland(@EddieWineland) February 16, 2013 Congratulations to @renanbaraoufc , @dedepederneiras @jairlourenco and the whole team ! Great win @ufc ! ”” Demian Maia (@demianmaia) February 16, 2013 Sick sub, better yet post fight celebration dance! #BaraoMcDonald #UFConFuel @ufc ”” Vinny Magalhaes (@VinnyMMA) February 16, 2013 Awesome fight with barao n McDonald… So explosive! ”” Sara McMann (@Sara_McMann) February 16, 2013 Michael McDonald is one rough dude #UFConFUEL ”” Derek Brunson (@DerekBrunsonMMA) February 16, 2013 Wow great sub finish there from the Champ! #UFCLondon ”” John Maguire (@MaguireTheOne) February 16, 2013 Damn nice fight..Tough fight Mcdonald, keep ur head up! ”” Tony Ferguson (@TonyFergusonXT) February 16, 2013 SWANSON TOPS POIRIER Good work Cubby!#KillerCub Proud of @cubswanson my #WEC brother ”” Carlos Condit (@CarlosCondit) February 16, 2013 Good win for Cub Swanson, he came out swinging and made a very exciting fight, fun to watch! ”” Bas Rutten (@BasRuttenMMA) February 16, 2013 That’s why those 2 are 2 of my 4 favorite featherweights. Thanks for the show brothers. @cubswanson @dustinpoirier (still wanted DP to win). ”” Yves Edwards (@thugjitsumaster) February 16, 2013 Hey @cubswanson how bout just knocking people out me and your brother were to nervous bud!!! Congrats homie ”” isaac vallie-flagg (@ikevallieflagg) February 16, 2013 Congrats Killer Cub! @cubswanson new #1 contender!!! ”” Aaron Riley (@aaronrileymma) February 16, 2013 @cubswanson @dustinpoirier look like brothers. Scrapping! ”” Urijah Faber (@UrijahFaber) February 16, 2013 Congrats to my Boy @cubswanson sick fight …still on that roll! .. #Represent ”” FranCisco Rivera (@CiscoRiveraUFC) February 16, 2013 Damn this is fun already. #UFConFuel ”” Jason High (@KCBanditMMA) February 16, 2013 Great fight and some great ground control by Cub in that 3rd round! Iv got Cub winning that fight! #UFCLondon ”” John Maguire (@MaguireTheOne) February 16, 2013 Cub throwing big shots! A little easier to see coming, but they got bad intentions! #UFC ”” Nik Lentz Ufc mma (@NikLentz) February 16, 2013 To everyone I let down …I’m sorry.I’m better than that performance. Congrats to Cub he fought a great fight ”” The Diamond (@DustinPoirier) February 16, 2013