Bruno Fernandes and Marcus Rashford inspired a stunning late turnaround to give Manchester United a 2-1 derby win over Manchester City a stirring victory that is set to be the subject of some debate given the circumstances around Fernandes' equaliser.Jack Grealish made an immediate impact from the bench to put Pep Guardiola's side ahead with an hour played, heading home Kevin De Bruyne's cro s.But United were level 11 minutes from time when Fernandes crashed home Casemiro's throughball. The flag was initially raised for Rashford being in a clear offside position but the goal stood because he did not play the ball and was deemed not to have interfered with an opponent.There was no doubt when Rashford converted a low cro s from substitute Alejandro Garnacho four minutes later to prompt bedlam at Old Trafford with his eighth in seven matches since the World Cup break Nathan Walker Jersey . United are now within a point of City, while league leaders Arsenal will be eight points clear if they beat Tottenham on Sunday. 1H 2H Final United022City011Goals:CITYJack Grealish (Kevin De Bruyne)60th minuteUNITED Bruno Fernandes (Casemiro) 78th minuteUNITED Marcus Rashford (Alejandro Garnacho) 82nd minuteBruno Fernandes causes scenes at Old Trafford! His goal is ruled onside after the linesman initially put his flag up! Football on BT Sport (@btsportfootball) Rashford enjoyed United's two best openings of a cagey first half, rounding Ederson to have a shot cleared out of the goalmouth by Manuel Akanji before the City goalkeeper denied him one-on-one.The Premier League champions were undermined by poor pa ses in the final third before the break. Erling Haaland had a 23rd-minute strike blocked by a combination of Casemiro and Fred, while Kyle Walker sent a long-range strike whistling just wide in first-half stoppage time.City improved considerably after halftime, playing at a sharper tempo and finding more penetrative pa ses. The opening goal was nicely worked, as Riyad Mahez clipped a pa s inside to De Bruyne, whose chipped delivery was converted by the on-rushing Grealish.Guardiola's men played with their customary control but did not offer too much threat when it came to extending their advantage before the major flashpoint arrived.Casemiro swept a pa s in behind the City defence, who had played Martin Fehervary Jersey Rashford offside. The ball ran in front of the England striker, who shielded it for Fernandes to ram a first-time finish beyond Ederson. The flag went up but, after a conversation between the officials, the goal stood.City, perhaps understandably, misplaced their composure and the rampantly in-form Rashford took full advantage when Garnacho found him at the second attempt.Marcus Rashford is at it again! Alejandro Garnacho and Man Utd's number 10 combine to put the home side 2-1 up in the derby! Football on BT Sport (@btsportfootball) MORE: When asked about the winning goal after the game, Guardiola tersely told BT Sport: "I know where we play." Perhaps it is hard to imagine an away team getting that decision in their favour at Old Trafford, but this was not simply a home-town call. Under the current offside rules, it was a fair goal: Rashford did not interfere with an opponent, did not play the ball, did not physically prevent a City player from touching the ball or attempt to play it himself.Of course, the City defence and Akanji in particular will feel very aggrieved. The Switzerland centre Mike Gartner Jersey -back held the defensive line and caught Rashford offside. In doing that, he was not in a position to try to play the ball and therefore po sibly bring Rashford into conflict with the regulations. Ten Hag himself described the rules as they stand as "confusing for the opponent... I can see it from the other side". Don't be surprised if this is one of those incidents that prompts a change to the guidelines, not that it will come as much consolation to City.Our rules expert says Manchester Uniteds controversial equalizer in the Manchester Derby was right to stand.She explains why under the laws Marcus Rashford was NOT interfering. CBS Sports Golazo (@CBSSportsGolazo) The manner in which they were outplayed from halftime until the equaliser, not to mention the peculiar circumstances of Fernandes' goal, means there should probably be some caution in this regard. Ten Hag certainly will not be getting carried away. But there is a robust edge to United that feels different to Braden Holtby Jersey pretty much any time since Alex Ferguson stood down a decade ago.It's been customary in this fixture for United to wilt once City start popping pa ses around from all angles. That didn't happen, with Raphael Varane and Luke Shaw both excellent as Haaland was left to feed off scraps. Casemiro has brought an irresistibly streetwise edge to a previously flimsy midfield. United as a club are also liberated from their Cristiano Ronaldo folly. If they beat Arsenal next weekend they remain the only team to have done that this season in the Premier League then things might just get interesting. It's starting to feel like a tall task for Guardiola's side, who are aiming for a third title in a row and a fifth in six seasons. Those sort of efforts can take a toll. Jurgen Klopp said this week that their back-and-forth battle with City last season took a lot out of his side and the same certainly appears to be true in Manchester. City have had their dip masked by Haaland's phenomenal goal return but there will be a few concerns about how he resided on the margins here, albeit while again showing his under-rated aptitude to come deep and link play. Despite dominating the ball, the champions could only muster an xG figure of 0.65.The unusual configuration of this season means City still have to play Arsenal twice in the Premier League, with a phoney war FA Cup clash thrown into the equation at the end of this month. In reality, if they let the gap get any bigger before travelling to Emirates Stadium on February 15, things will become very tricky indeed.Manchester United 2-1 Manchester CityThis game completely flipped on its head in a 4-minute spell Opta Analyst (@OptaAnalyst) Fulltime: A huge, huge win for United - albeit one with a controversial decision that will dominate the post-match discu sion. No one aside from the Manchester T.J. Oshie Jersey City contingent inside Old Trafford cares a jot. The City players have headed for some post-match discu sion with Stuart Atwell and it's all getting a bit heated. Is that the end of City's title defence? Probably not, just yet, although it is a body blow. Is it the start of United's title charge? Perhaps...90th minute+6: David De Gea claims the ball. Lies down on it. The referee tells him we can't really end the game like that.90th minu