Weekend in sport: Manchester City extend winning run; Federer goes down; F1 fisticuffs

    David Silva celebrates with teammates after scoring the first goal during the Manchester derby at the Etihad Stadium.

    (CNN)Roger Federer loses at the ATP Finals in straight sets... The blue half of Manchester celebrates as United lose to City... The All Blacks eke out a narrow victory... Boca Juniors denied a home win in Copa finals... Hamilton's win overshadowed by slaps. This is your Monday sporting recap.

    Federer falls to Nishikori in ATP Finals

    Japan's Kei Nishikori celebrates match point against Roger Federer of Switzerland during Day One of the Nitto ATP World Tour Finals.
    Swiss serial champion Roger Federer lost his opening match of the Nitto ATP Finals, going down to a shock defeat to Japan's Kei Nishikori, losing 7-6(4), 6-3 at the O2 in London.
      The Japanese held his nerve to beat the six-time former champion for the first time since 2014, winning six of the first seven tie break points to put pressure on Federer. Following a nervy first set for Nishikori, the pair went toe-to-toe at the beginning of the second, exchanging service breaks before Nishikori settled and ground out the win.
      Federer later said he felt that neither player sparkled during the first set and that he rued not being able to hold onto early second-set momentum. "I felt we both struggled throughout the first set," he told the official ATP website.
      Roger Federer in action.
      "I had my chances maybe a bit more than he did. Then I started to feel better in the second set. I think we both did. The level went up. Unfortunately, I couldn't keep the lead that I got early."
      Federer will now face Australia's Dominic Thiem in the round-robin tournament, while Nishikori plays fourth seed Kevin Anderson of South Africa in Group Lleyton Hewitt. Thiem lost to first-time qualifier Anderson earlier in the day.

      Man City outclass United

      Ilkay Gundogan of Manchester City celebrates after scoring his team's third goal against cross-town rival Manchester United.
      It was business as usual at the top of the English Premier League table, as leader Manchester City brushed aside its biggest rival Manchester United with a cool 3-1 win.
      The victory emphasized the current gulf in class between the two cross-city rivals, with Pep Guardiola's City sealing the win with a memorable team goal from Ilkay Gundogan -- the German finding the net after a 44-pass move, adding to goals by long time City stalwarts David Silva and Sergio Aguero. The emphatic win sends the Sky Blues two points clear in the standings and gives Guardiola further bragging rights over long-time foil Jose Mourinho, whose Manchester United now sit eighth in the Premier League table.
      Man City's Pep Guardiola looks on in front of rival Jose Mourinho of Manchester United.
      Elsewhere in the EPL, second-placed Liverpool escaped with a lucky 2-0 win against Fulham when Aleksandar Mitrovic had a goal incorrectly ruled offside, only for the Reds to break up field for Mo Salah to score his eighth of the season. Swiss international Xherdan Shaqiri put the result beyond reach with a second after the break.
      Later, Chelsea missed its chance to go temporarily top, but was held to a goalless draw by an improving Everton at Stamford Bridge, while fifth-placed Arsenal escaped in a 1-1 home draw against promoted Wolves, with Henrikh Mkhitarayan sparing the Gunners' blushes with an 85th minute equalizer. The result means Arsenal extend their unbeaten run in all competitions to 16 matches.

      All Blacks taken to the wire at Twickenham

      The All Blacks perform the haka prior to the Quilter International match between England and New Zealand.