Manchester City's Sergio Aguero says he may not start on Sunday

Sergio Aguero came off the bench at West Brom on Monday

Manchester City forward Sergio Aguero says he is unsure whether he will be fit enough to start Sunday's clash with Premier League champions Chelsea, live on Sky Sports.

Having been on international duty with Argentina over the summer, Aguero is being gradually eased back into Premier League action.

He is behind his team-mates in terms of pre-season training and only came on for the last 27 minutes of Monday night's 3-0 victory at West Brom.

City boss Manuel Pellegrini adopted a similar strategy with Aguero last year and the striker was a substitute for the first two matches of the season before going on to score 32 goals in 41 appearances.

Having begun their bid to reclaim the title with a convincing win at The Hawthorns, City will welcome Chelsea on Sunday afternoon (live on Sky Sports 1 HD from 3.30pm).

And Aguero told the Manchester City website: "Whether I start or not remains to be seen.

"I'm trying to get there and be in top condition but, arriving for pre-season later having taken part in the Copa America with Argentina, means I need some additional time.

"With the whole season in mind, what matters the most is that I get in top form and don't take any risks."