Chelsea are preparing a fresh bid for Everton defender John Stones according to a report in the London Evening Standard, having had a bid of around £20 million rejected.
Everton are said to have been unhappy at the way Chelsea made the bid after being told he wasn't available for transfer, the Standard's report suggests.
Jose Mourinho seems pretty keen to land the defender, and is apparently set to make a bid of around £26 million, but Everton value him in excess of £32 million, which would make him the most expensive English defender.
The 21-year-old was one of Everton's best performers last season, and it was no surprise that when he was available to play then the Toffees' back line looked more settled and secure.
There are several reasons that Roberto Martinez will want to keep hold of the player. Not only for his ability, but his best years are ahead of him, and he will want Stones to be the main cog in the defensive unit.
Phil Jagielka is now 32 and though he still has some years ahead of him, Stones is the future as well as the present - and after a season where their defence looked vulnerable they will not want to lose such a good player from that position, especially ahead of a season where they hope to bounce back.
The ball seems to be in the court of the 21-year-old. If he shows signs of wanting to leave for Stamford Bridge - which has the lure of the Champions League and regularly challenging for the Premier League title, it could be a hard task for Martinez to keep hold of him.