First-half goals from Marcus Rashford and Anthony Martial were enough for Manchester United to secure a thrilling 2-1 derby win over Premier League champions Manchester City at Etihad Stadium.
Rashford won and scored a penalty before Martial added a deserved second to send Ole Gunnar Solskjaer's United into half-time in full control.
Pep Guardiola's champions tried to rally after the break but United were equal to much of what they had to offer - and though Nicolas Otamendi scored a header late on to make it a nervy finish, the Red Devils saw out the result to seriously damage City's title hopes.
However, the result was marred by allegations of racist abuse: Man City are investigating after video footage emerged showing one supporter appearing to make a monkey gesture towards United players.
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Team news
Man City XI: Ederson, Walker, Stones, Fernandinho, Angelino, De Bruyne, Rodri, Silva, Bernardo Silva, Gabriel Jesus, Sterling
Subs: Bravo, Gundogan, Mendy, Mahrez, Joao Cancelo, Otamendi, Foden
Man Utd XI: de Gea, Wan Bissaka, Lindelof, Maguire, Shaw, McTominay, Fred, James, Lingard, Rashford, Martial
Subs: Mata, Andreas Pereira, Young, Romero, Greenwood, Tuanzebe, Williams
Referee: Anthony Taylor
