The 30-year-old is one of a number of fitness issues facing Southgate and Stones had hoped to train all of this week in Germany in an attempt to be ready for the Serbia game.

Stones had trained with the England squad on Tuesday before complaining of feeling unwell and having to miss Wednesday’s session and remain in his room at the team hotel.

Stones is the only central defender in Southgate’s 26-man squad with any major tournament experience and Lewis Dunk would compete with Ezri Konsa to stand in for Stones and partner Marc Guehi in the centre of defence.

Over half million England fans to descend on Germany during Euros

By Matt Law

More than half a million England fans could descend on Germany during the European Championship to back Gareth Southgate’s team.

Football Association chief executive Mark Bullingham is expecting a huge influx of travelling fans from England for this summer’s tournament but is confident they will not cause trouble.

German police appeared to single out England fans by insisting that only low alcohol beer will be served during the opening game against Serbia, which has been classed as high risk.

But Bullingham said: “I would say that our fans, again, in 2006 (in Germany) were the fans of the tournament and over the last few years, we’ve shown our fans have been great supporters of the team and behaved well.

“Obviously, you are going to have a big volume of people and that’s maybe a factor they need to consider. We are expecting – I’m not really quite sure how anyone really measures this – up to half a million people estimated. Understandably, with that volume of people, they will be looking at that.

“I’ve even heard larger numbers than that. That’s the number the police quoted really early on, quite whether anyone will even know after the tournament whether that’s the right number or not, I don’t know.

“But there will be a lot of fans and a lot of fans who haven’t travelled before because the last couple of tournaments away, we’ve had less than 5,000 fans, so it is a different dynamic. But our fans have been really good in the last couple of years, brilliant support for us and we hope that continues.”

Bullingham also revealed that the FA have agreed to pay for the police to prosecute anybody who abuses England players on social media during the Euros. The cost could rise to £25,000.

“In the past what we did was put together all the data, effectively an evidence pack, to give to the police to prosecute,” said Bullingham. “But this time we have gone a stage further where we are actually funding a unit within the British Police that will then prosecute.

“What we don’t want to do is create a pack that we then give to the police for them to prosecute, but they don’t have the resources to actually take that forward. So we are actually paying for the prosecution to happen and funding the police to make sure if there are instances of some examples we have seen before, that they got prosecuted.”