"First of all I have to earn a place on the pitch," he said. "I've always given my best regardless of whether I have the captain's armband."
Vidic is aware he will have to adapt to the tactics of Inter coach Walter Mazzarri.
"Last year I was able to watch many Inter games and I've had the opportunity to get to know my new team," he said."I've never played in a three-man defence but the role of a defender remains the same whether you play with three or four in the line."
Inter finished fifth in Serie A and will compete in next season's Europa League.