Sergio Aguero has become increasingly concerned about his long-term prospects remaining with Manchester City.

Aguero has been rotated with Gabriel Jesus by Pep Guardiola.

Aguero started last week's 4-1 victory over Tottenham Hotspur but was replaced after 56 minutes with Guardiola saying after the match that he wanted "a little more energy."

Sources said Aguero is concerned about a possible lack of confidence in his ability from Guardiola, particularly after City were close to adding Arsenal forward Alexis Sanchez in the summer.

Guardiola said last season that he wanted him to stay adding: "I want to be clear that I am so happy with Sergio, and hopefully he can stay for a long, long time here."