PHOTO: Is this a side to Diego Costa which should worry Mourinho?

Diego Costa squared up to a Vitesse Arnhem playing following a challenge on the Chelsea striker.

Diego Costa showed a side to his character against Vitesse Arnhem which could both delight and worry Chelsea boss Jose Mourinho.

At one point during the 3-1 victory the Spanish international squared up to an opponent, which resulted in the referee having to intervene and separate the players.

On the one hand, Mourinho will be delighted to see Costa so passionate and caring about the way he’s being treated during a normal, low profile pre-season friendly.

That sort of passion and fire was missing from Chelsea’s attack at times last season.

On the other hand, it’s a worry and something that Chelsea’s opponents next season may look to focus on.

Some Premier League sides will look to level the playing field against the Blues with aggressive tactics and they’ll try to get under the skin of players like Costa to force a mistake and to try and gain a numerical advantage on the pitch.

Costa has made a superb start to life as a Chelsea player, but in a more physical league than La Liga, he may have to put the brakes on an evident temper.

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