Birmingham City boss Harry Redknapp believes Chelsea could lose star duo Eden Hazard and Diego Costa this summer.

Redknapp wrote for the London Evening Standard: "Chelsea will be desperate to do the Double. They've had a breather after winning the Premier League but Antonio Conte won't have let them take their foot off the pedal too much. He'll have drilled them hard this week and they'll want to sign off with another trophy.

"Whether it'll be enough to keep their best players at the club, who knows? Chelsea can rightly say they're the best club in England but it depends who comes in for them and what their ambitions are.

"If Real Madrid come in for Eden Hazard, he may go. If Diego Costa wants £500,000 a week in China, he could easily go there. They might think they've achieved all they can at Chelsea and move on. But whatever the future holds for them, that can't be an excuse for Chelsea either this weekend."