• Old Trafford club tell intermediaries defender would be welcome at United • Everton will not sell for less than £30m; Chelsea’s second offer rejected

Chelsea have had a second offer of £26m for John Stones turned down by Everton while Manchester United have also made known their interest in the defender. United have contacted intermediaries working on Stones’s behalf to make him aware that they would welcome him at Old Trafford but they have not yet made a formal approach to Everton and it is Chelsea who are at the front of the queue for his signature.

José Mourinho sees the 21-year-old as a potential long-term successor to John Terry and, although the Chelsea captain remains integral to the club’s starting XI, there is an acknowledgment at Stamford Bridge that now is the time to test Everton’s resolve. Were Chelsea to wait for another season, Stones’s price would surely rise.

José Mourinho confident in Chelsea but still wants John Stones | Steve Brenner Read more

As it is, Everton will refuse to sell him for less than £30m, which would represent quite a mark-up – they signed him for £3m from Barnsley in January 2013. Everton rejected Chelsea’s opening bid of £20m last week and they gave short shrift to Tuesday’s follow-up.

Chelsea’s pursuit of the player and how Mourinho was happy to talk about it last week during the club’s tour of the United States have annoyed Roberto Martínez; the Everton manager wants to buy a centre-half not sell one, having released Sylvain Distin. Martínez has said he is under no pressure to sell players, though Tottenham Hotspur are considering an offer for the midfielder James McCarthy.

Stones has four years to run on his contract and has said in public that he is happy at the club. Chelsea and United, however, could offer him Champions League football.

Stones, who has four England caps, would be considered as homegrown in terms of the Premier League and Champions League, which would be a boon to Chelsea and add to their options. He would also provide cover at right-back for Branislav Ivanovic.

Mourinho, who has been relatively quiet so far this summer in terms of senior additions, having signed only Radamel Falcao on loan and Asmir Begovic, recognises that the market for young, English talent remains inflated. The Chelsea manager said last week: “It is the market and you only pay it if you want it. If you don’t want to pay it, don’t pay. It’s as simple as that. The market has no rules or limits from season to season.”