The Sivasspor coach has slammed the experienced attacker's behaviour in Russia prior to his move to the Premier League
Carlos and Eto'o first played together at Real Madrid in the 1990s, before they were re-united at Anzhi in 2011, but the current Sivasspor boss was not impressed with the Cameroonian attacker's attitude at the Dagestan side.
"I've known Eto'o since he was 16. He's a good person and I've always liked him, but he always thinks of himself, not the group," Carlos told Globoesporte.
"It's quite confusing and odd when a footballer, instead of playing, is interested in bringing in players who are his friends. He did everything at Anzhi, except play football.
"There were a few small problems in the dressing room with the arrival of Eto'o, which were resolved. His signing had to be explained to several players.
"Then there came a point when Samuel wanted to interfere in my work. He wanted to control the club, taking my place and that of the coach, Guus Hiddink."
The 32-year-old Eto'o left Anzhi for Chelsea in the summer transfer window after a squad overhaul at the Dagestan outfit.