Chelsea will travel across the city to West Ham United on Saturday in an effort to become the first team in the capital to reach that milestone after failing to secure their 150th victory in a London derby against Fulham last time out. Graham Potter may not have desired consecutive scoreless draws, despite the fact that they did resolve some defensive issues. They have only won two of their last twelve Premier League games (D5, L5), and they have only scored seven goals overall. That is how many goals they scored in their first three victories at Stamford Bridge in league play. Though he has only experienced success in two of the seven games he has managed against West Ham, the sight of the claret and blue shirts should still make him smile. For a while, David Moyes found Chelsea to be kind of an unbreakable curse. But he has now defeated the Blues three times in his last four home games with the Hammers, which equals the 13 victories he had before in all competitions when managing Everton, Sunderland, and Manchester United. The issue is that West Ham has dropped eight of their last ten London derbies in the Premier League, which equals the number of losses from their previous 20 such contests combined. They also alternated between winning (four) and losing (D1 L2) their last seven home Premier League games versus Chelsea, despite winning this particular matchup 3-2 the year before.