Is this VIDEO proof Diego Costa is unhappy at Chelsea?

There is something wrong with Chelsea striker Diego Costa, or at least that is what the video from Chelsea’s last training session is suggesting.  

The Spanish international striker was among the first ones to emerge on to the Cobham training ground, but he appeared to be particularly restless.

Perhaps Costa is disappointed with his recent form which saw him fire blanks in four consecutive games for Chelsea, but that can hardly justify his behavior at training ahead of Bournemouth clash with the Spaniard driving around recklessly, before smashing a couple of hurdles a member of Chelsea coaching staff was carefully laying out.

The Spain international apologized soon afterwards, but some of his teammates did not find any of his antics funny.