England players began their final training session before facing Croatia by looking up to the skies, as a plane flew overhead with a banner displaying some tactical advice for the Three Lions.

Manchester United and Manchester City players were among the 25-strong group training, as excitement builds for England's Euro 2020 opener on Sunday.

There was a fitness worry for United, but more good news for Harry Maguire, while Jack Grealish was getting on well with a number of City players as speculation continues to link the Villa captain with a move to the Etihad.

And United fans might be interested to see Marcus Rashford and target Harry Kane deep in conversation, as Premier League rivals become international teammates for the next month.

We looked over the footage from England's open training session and picked out some points of interest ahead of the big Croatia clash:

Rashford and Kane out first

What could Marcus Rashford and Harry Kane be talking about?

As Gareth Southgate chatted with his coaches, it was England's two more experienced strikers who were out first, and deep in conversation as they walked out.

Maybe the training pitch on the eve of a big game isn't the place for transfer talk, but Rio Ferdinand said this week that players do discuss potential moves, so expect the United contingent to be checking in on Kane and Jadon Sancho every now and again.

'Most Croatia goals come down left'

A plane flew over England training with some tactical advice.

As the squad gathered, they began looking to the skies as a plane flew overhead displaying a simple tactical message: "Most #Cro goals come down left."

Phil Foden and Jude Bellingham were among the players taking a look at the advice, although are the authors suggesting that England need to shore up the left side of their defence, or target Croatia's left side to get some joy themselves?

You'd expect Southgate to be well aware of Croatia's weaknesses, but the plane shows how invested England fans will get over the coming weeks, and the level of support they can offer the Three Lions.

Foden and Bellingham try to read the message on the banner.

Squad show respect for Sterling

Before training began, Gareth Southgate gave a speech and led the squad in a round of applause. Could that be for City's Raheem Sterling and Liverpool's Jordan Henderson, who were both given honours in the Queen's Birthday Honours list?

No Henderson, but Maguire trains

Dean Henderson missed the training session as a precaution, said to be down to 'niggles'. That might put his involvement in the Croatia game at risk, but Harry Maguire's slim chances of playing remained as he trained for a second day running.

United's and City's other players all trained and looked lively, and could give England a strong Manchester representation at Wembley on Sunday.

Playing Chicken

Phil Foden tries to hit Luke Shaw with a rubber chicken for the purposes of team bonding.

Perhaps aware that the first part of training was available for anyone to watch, England did little ball work, and instead brought out the rubber chickens for a popular game among players. Split into teams, they were throwing the toy chicken to each other and trying to tag an opponent, with seemingly hilarious results.

Phil Foden, Raheem Sterling and Jadon Sancho were all getting involved in the fun, with Liverpool captain Jordan Henderson also joining in with the jokes. Marcus Rashford this week stressed the importance of players putting club rivalries to one side while with England, and there has been no sign of any animosity among players - as highlighted during the chicken game.

Grealish jokes with City players

Jack Grealish has been bonding with City players this week.

As well as targeting Harry Kane, City are being strongly linked with Jack Grealish, so fans might be encouraged to see the Villa man holding his own in a rondo against Phil Foden, Kyle Walker and City-educated Jadon Sancho.

Later pictured hugging John Stones, Grealish was joking around with Kyle Walker to decide who was next in the middle of the rondo, and seems to be a popular player among England's City players already.