LONDON: Chelsea, Manchester City and Manchester United showed their rivals no seasonal cheer on Friday (Dec 26) as they consolidated their positions in the Premier League table with one-sided Boxing Day victories.Leaders Chelsea set the tone by overcoming West Ham United 2-0. City followed suit with a 3-1 success at West Bromwich Albion and United kept pace by beating Newcastle United 3-1, with Wayne Rooney scoring twice and making one.Chelsea continue to lead City by three points, with United seven points further back, while West Ham’s loss allowed Southampton, Arsenal, Tottenham Hotspur, Swansea City and Liverpool to make up ground in the race for the top four.Goals in each half from John Terry and Diego Costa – his 13th of the campaign – earned Jose Mourinho’s Chelsea a one-sided home win over West Ham, who slipped to fifth. West Ham were expected to provide a stern test after a run of five games without defeat, but despite Morgan Amalfitano hitting the post late on, Sam Allardyce’s team were well beaten in what was the London rivals’ 100th encounter.”We played a very good game against a very difficult opponent. When we scored, we had the game always under control,” Mourinho told…