Manchester United just about got the better of West Ham United in the fifth round of the FA Cup thanks to Scott McTominay's extra-time winner.Manchester United had to dig deep to grind out a result against a resolute West Ham United. The Hammers dug their heels in and neutralized most of what the Red Devils threw at them on a snowy night in Manchester. Ole Gunnar Solskjaer ended the night with a smile on his face but it could have easily been a frustrating night in the dugout for the Norwegian.It was all Manchester United in the first half with West Ham satisfied to populate their own box with bodies. They struggled to get into the attacking half as they sat really deep in their own.The Red Devils came close to scoring via a Lindelof header from a corner but Lukasz Fabianski did incredibly well to claw a deflected effort on to the post and quell the danger.Manchester United kept chipping away but the Hammers threw themselves in the way of most of the hosts' attempts.Ole Gunnar Solskjaer's side had a great chance to go in front within 10 minutes of the second half but Marcus Rashford continued his trend of producing tame finishes when presented with great open opportunities and hit a deflected cross straight at Fabianski.West Ham had to take off Ogbonna and Yarmolenko due to injuries and Manchester United should have really stamped their authority with the chances they had.The game dragged on from there however, with both teams getting sluggish in the buildup to the whistle at the end of the ninety.Manchester United looked revitalized with the introduction of Bruno Fernandes but the end product was still lacking. Neither team created anything of note as the game rolled on into extra-time.Manchester United finally broke the deadlock at the end of one of their rare counter attacks of the night. Fred's cross from the left side of the area was pinballed around until Rashford flicked it on to an oncoming McTominay who buried it with a first-time shot.Scott McTominay can't stop scoring 🔥 pic.twitter.com/aNibwBkH1A— ESPN FC (@ESPNFC) February 9, 2021Several Manchester United players had rather forgettable outings but the most important thing is that they were able to eke out a win.Twitter reactions as Manchester United progress to the quarter-finals of the FA Cup To start things off, two Manchester United players hit the same milestone tonight.One of our own.👏 @MarcusRashford is set for a milestone United appearance tonight!🔴 #MUFC🏆 #FACup pic.twitter.com/kfuXoxR1Uh— Manchester United (@ManUtd) February 9, 20212⃣5⃣0⃣A landmark evening is also in store for @AnthonyMartial! 🙌🔴 #MUFC🏆 #FACup pic.twitter.com/WJH5os3Csw— Manchester United (@ManUtd) February 9, 2021Credit where credit's due. Here's to the Manchester United captain.Harry Maguire was awarded the Man of the Match from the BBC. Here is his game in numbers:111 touches84 passes completed (88%)10/11 aerial duels won (91%)5 clearances3 interceptions3 recoveriesA solid performance. pic.twitter.com/uPoOKlnlNl— UtdArena (@utdarena) February 9, 2021Moving on to the man of the hour, Scott McTominay.Scott McTominay has scored important goals this season: ⚽️ vs. Brighton⚽️⚽️ vs. Leeds⚽️ vs. Watford⚽️ vs. Southampton⚽️ vs. Everton⚽️ vs. West Ham5 out of 7 goals have given Manchester United the lead. pic.twitter.com/PcpYuQU7Qv— Maram (@utdmaram) February 9, 2021Three games, three goals for Scott McTominay 🔥 pic.twitter.com/6vZnzKczvK— B/R Football (@brfootball) February 9, 2021Scott McTominay this season pic.twitter.com/7TRzRIR0A2— Devils of United 🔰 (@DevilsOfUnited) February 9, 2021Scott McTominay scores for a 3rd successive game for @ManUtdHe has 6️⃣ goals in his last 9️⃣ apps at Old Trafford - as many goals as Anthony Martial (4) & Edinson Cavani (2) combined at Old Trafford this season pic.twitter.com/YO6NsDA8uN— Sky Sports Statto (@SkySportsStatto) February 9, 2021So something has definitely changed.7 - Scott McTominay has scored seven goals in his 30 appearances in all competitions this season, the same number has he managed in his 84 other Manchester United matches prior to this campaign. Sauce. #MNUWHU pic.twitter.com/izfwji15i9— OptaJoe (@OptaJoe) February 9, 2021If you missed it, Dean Henderson dribbled past an oncoming attacker in the dying embers of the game to give Manchester United fans a nervy moment.Dean Henderson has got feet like Ronaldinho my word— ‘ (@vintageredss) February 9, 2021Dean Henderson completed as many dribbles as he made saves against West Ham [1].A quiet night and a clean sheet. 👍 pic.twitter.com/eRLnv3f7yJ— Statman Dave (@StatmanDave) February 9, 2021Just give Donny van de Beek more time. He is not at a level where he can challenge Pogba or Bruno for a starting berth just yet. He's still quality though.Van De Beek needs time and we are just lucky to have Bruno Fernandes. Change in tempo pretty obvious since change.— The United Link 🏆 (@TheUnitedLink) February 9, 2021Van de Beek looking over to see his number on the board. pic.twitter.com/1W4oQJ6NcY— Paddy Power (@paddypower) February 9, 2021-Fabinho took months to break into the first team at Liverpool -Cancelo took a year to break into Man City’s team-Ferran Torres is being eased in at City.Van De Beek’s time will come. pic.twitter.com/EE6KH1hKbu— Alexei (@MUFC_redarmy99) February 9, 2021Apparently Mark Noble shoved Van de Beek after someone told him the Netherlands was in the EU.— Paddy Power (@paddypower) February 9, 2021