Diego Costa is already playing up at Atletico Madrid, it has been revealed.

The former Chelsea striker is working with Atletico fitness coach Profe Ortega after missing preseason over the summer.

Don Balon says Costa has been nagging Ortega about doing more with the ball, something which the coach has so far denied him. The striker has exploded at times with his frustration - particularly when he must train away from the senior squad.

For now, Atletico staff have shrugged off the antics, believing it is just Costa's frustration boiling over as he is denied the chance to play due to Atletico's transfer ban.

Meanwhile, Kevin Gameiro and Luciano Vietto are already fearing they will be forced to move on in January when Costa is eligible to play again for Atletico.