PHOTO: Schurrle, Oscar and co back in training for Chelsea

A key World Cup quartet are back in training at Chelsea.

Chelsea have announced that four key first team stars are back in training.

The club posted the above photo on their Twitter feed, displaying Andre Schurrle, Oscar, Ramires, and Willian in action on the training pitch at Cobham.

Schurrle helped inflict a painful 7-1 defeat on the Brazilian trio in the World Cup semi-final, netting twice in the match, and went onto win the trophy.

The foursome are now working towards getting back to full fitness, ahead of the Premier League season kicking off in a fortnight's time.

They can each expect to play some part in the club's final friendly match against Real Sociedad.

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