Jamie Redknapp is of the belief that Chelsea are good enough to retain their Premier League title.

The Blues won the 2014/15 trophy by eight points over second-placed Manchester City and Sky Sports pundit Redknapp feels that Jose Mourinho has in place a squad capable of defending what they achieved in that dominant season.

But the former Liverpool midfielder has highlighted striker Diego Costa's ongoing hamstring struggles as a major cause for concern for the West London club.

Redknapp's season preview of Chelsea read: "A lot can change before the transfer window closes, but as it stands right now, I make Chelsea favourites to win the Premier League this season.

"However, there hasn't been that buzz around them that there was last year. When they signed Diego Costa, Cesc Fabregas and got Thibaut Courtois back from Atletico Madrid last summer, you felt 'there's something really special happening with Chelsea' and everyone thought they'd win the league.

"Chelsea should have won the title in 2013/14 but didn't have a striker. Last year Costa provided the goals they were missing.

"But he's had these hamstring problems for nearly two years and it looks like he could miss the opener against Swansea, at least. It must be a worry for Chelsea.

"However, Eden Hazard is the main man - and I'm expecting an even better season from him this year."