Robin Van Persie scored in extra time as Manchester United edged Manchester City, 3-2, on Sunday to extend its lead in the English Premier League to six points.
Wayne Rooney scored a brace in the first half for United, but Yaya Toure and Pablo Zabaleta pulled City level in the second half before Van Persie notched the winner on a deflected free kick two minutes into stoppage time.
United ended a 37-match home unbeaten run for City, and the post-match scenes turned ugly when center back Rio Ferdinand was struck by an object thrown from the crowd.
Ferdinand was left bloodied with a cut over his left eye, but it was City that was left feeling blue at Etihad Stadium after a battle of the top two clubs in the standings.
Rooney scored his first goal in the 16th minute when he created space against three City defenders and slotted back to the near post to give goalkeeper Joe Hart no chance.
United was up two goals inside the half-hour mark as the 27-year-old Rooney deposited a first-time shot past Hart to become the youngest player to score 150 Premier League goals.
Toure brought City back into the match on the hour when he turned a pass from Carlos Tevez into the bottom corner, and Zabaleta scored off a poor clearance four minutes from time to put the clubs on level terms.
United escaped with the win when Van Persie's free kick took a deflection off Samir Nasri to fool Hart and float perfectly inside the left post as the City goalie was unable to recover to prevent his club's first league loss.
The celebration was momentarily marred by the post-game scenes, which included a fan running on the field, but Ferdinand - who received medical attention on the pitch - rejoined his teammates moments later to celebrate a Red win in the Manchester derby.
Everton 2, Tottenham 1
Liverpool, England - Steven Pienaar scored in the final minute of normal time and Nikica Jelavic followed in extra time as Everton surprised Tottenham, 2-1, on Sunday at Goodison Park in the English Premier League.
Clint Dempsey scored in the 76th minute for Tottenham, but Pienaar leveled the game in the 90th minute and Jelavic scored two minutes later as Everton earned a stunning victory to remain unbeaten at home this season.
With four wins and four draws at home, Everton is one of just two clubs yet to lose at its own stadium in the league this season. Stoke City, which has four wins and three draws, is the other.
Tottenham was in line for its fifth road win this season after Dempsey notched his third goal of the season, but Everton rallied to secure a win that vaulted it over Spurs and into fourth place.
Spurs is fifth, trailing Everton on only goal differential.
Liverpool 3, West Ham 2
London, England - James Collins' own goal 12 minutes from time gave Liverpool a 3-2 win over West Ham on Sunday at Boleyn Ground, as the Reds moved into the top half of the English Premier League standings.
Glen Johnson staked Liverpool to the lead in the 11th minute, but Mark Noble converted a penalty in the 35th and an own goal from Steven Gerrard just three minutes before half put West Ham in front at the break.
Joe Cole pulled Liverpool even with a finish to the bottom right corner in the 76th minute, and Collins gifted the Reds their own goal when a cross from the right just Jonjo Shelvey and deflected off Collins and past goalkeeper Jussi Jaaskelainen.
Liverpool won its second consecutive match and for the third time in its last five. West Ham lost for the third time in its last four games and slipped to 11th, one place behind Liverpool on goal differential.