Roberto Carlos has warned that former team-mate Samuel Eto o could be a damaging influence in the Chelsea dressing room.
The pair played together while at Russian side Anzhi Makhachkala, with Carlos joining the club first as a player before moving to form part of Guus Hiddink s backroom staff.
Eto o was brought in from Inter on a lucrative package in 2011 but Carlos who has since left the Russian outfit, along with Hiddink, following a cost-cutting exercise over the close-season believes that the Cameroon international can be a disruptive influence.
I ve known Eto o since I was 16, and from that time on he s always been a good guy who I ve liked a lot, Carlos told Globo.
He s a good person, but there s a part of him that thinks I, and not the group , which is really damaging.
When a footballer, instead of playing, is interested in signing players who are his friends it s confusing and strange.
He did everything at Anzhi, except play football.
Carlos added that the management team s control over the squad began to dwindle when first Eto o arrived.
We managed to professionalise the team. In the second year, we signed Eto o and I had control of the team I organised the players and worked with the coach. I put Anzhi among the best, he continued.
With the arrival of Eto o, with the values of everyone involved, I had some little problems in the dressing room and had to talk to the Russian players and explain why Eto o was there.
However, a moment arrived when Eto o thought to interfere with my work, to control the club, taking my position and that of Guus (Hiddink).
Eto o moved to Chelsea in August on a one-year deal, linking up with his former boss at Inter, Jose Mourinho.