Costa plays hilarious prank on Chelsea teammates at training

Seven points clear with the Premier League title within their grasp, morale is clearly high at Chelsea with the notoriously fiery Diego Costa even showing his lighter sight at training.

Costa was in high spirits during Thursday's (Friday AEST) training session at Cobham, playing a prank on his teammates by poking fun at himself and his well-known combustable temper.

The striker is seen hijacking the club's utility cart and taking it for a joyride, mowing down a row of witches hats.

Then, to the amusement of his Blues teammates, the Spaniard pretended to have a moment of rage by smashing up a number of hurdles laid out by the coaching staff.

Not to be outdone Chelsea's arch-prankster David Luiz also got in on the action.

Not that Chelsea skipper John Terry found the Brazil defender's idea of a joke very amusing.