Roberto Carlos has warned Chelsea that new striker Samuel Eto'o can have a 'damaging' influence on the dressing room. The former Anzhi Makhachkala team director revealed that the Cameroon striker interfered with his work at the Russian club to the point that he considered quitting. In 2011 Carlos was at Anzhi when they sanctioned a deal to buy Eto'o from Inter Milan making him the highest paid player in the world. After scoring 36 goals in 71 appearances Eto'o moved to Chelsea on a free transfer this summer and could make his debut on Saturday at Everton. But in an interview with newspaper Globo Carlos expressed his disappointment at what Eto'o contributed during his time at Anzhi. He said: '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. 'He's a good person but there 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.' Reflecting on how their relationship broke down Carlos added: 'I came to the club and in my first year we finished in the top five. '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. '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 the coach].