5 players who betrayed their managers?

#2 Diego Costa

Diego Costa labeled Chelsea as criminals

It is quite difficult to grasp the ramblings of the mind of any human being. In case of Costa, perhaps even he himself doesn't know what is it that he exactly wants. At first, he represented Brazil in a friendly, but the moment he got Spanish nationality, he decided to swap national teams and opted to play for Spain.

And when it comes to club football, the Brazilian-born player is equally confusing in his ways. Earlier this year in January, the former Atletico man wanted to move to China for a mega-money contract and was on the brink of the move, which collapsed at the last moment due to the foreign players-per-team rule in China.

After that, Chelsea tried to offload him to other clubs, but he was only interested in a move to Atletico Madrid and actually used his lawyer to legally push this deal. He was seen partying in Brazil in an Atletico Madrid shirt and did everything he could do to secure a move back.

And finally, he did as Atletico Madrid have signed him and he can once again play for them after their player registration ban expires in January.