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Leaders Chelsea tightened their grip on the Premier League's top spot with a 2-0 victory over West Ham.

The Blues had already come close through Oscar and Gary Cahill when John Terry turned in Diego Costa's header from close range.

After a tame first half, West Ham offered more in the second, but their hopes were snuffed out by Costa's drilled finish just after the hour.

Morgan Amalfitano hit the post late on for the Hammers.

This clip is originally from 5 live Sport on Friday December 2014.