The portents are promising for Chelsea and ominous for their rivals. This is the fourth time that Chelsea have enjoyed the view from the top of the Premier League come Christmas and on each of the previous occasions they have gone on to win the title. John Terry’s header after only 95 seconds followed by a second-half goal from Cesc Fàbregas secured Chelsea’s place at the summit and restored their three-point advantage over Manchester City.It was, in short, a much happier experience for José Mourinho than 12 months ago when his Chelsea side were beaten 3-2 here and the Portuguese departed bemoaning their failure to “kill the game”.