Alejandro Garnacho poses with 'Mini Messi and Ronaldo' in birthday picture

Manchester United star Alejandro Garnacho caught fans by surprise in a bizarre photo that has been leaked from his birthday celebrations.

The Argentine forward turned 19 on Saturday and the youngster appeared to be enjoying himself in images that have been shared on social media.

There was one particular photo that caught the eye of football fans though, as he posed with an Argentina themed football cake.

Holding the cake in front of the youngster, was what some on social media dubbed as 'Mini Messi and Ronaldo'.

The pair were dressed in Argentina and Portugal kits respectively, though the 'Mini Messi' had other fans fans suggesting he was actually at the party dressed as Garnacho's club and country team mate Lisandro Martinez.

United fans though spotted another feature from the photo which they believe is hinting at what shirt number he will wear next season.

Garnacho, who wore the No 49 last season, had the No 19 at the top of his cake to mark his birthday, but it also had the No 7 on it.

The youngster also hit seven million followers on Instagram on Sunday, marking the occasion with a photo which shows the No 7 on his back.

The shirt number has remained vacant since Cristiano Ronaldo's tumultuous exit from the club last year.

Garnacho wouldn't be the only player eyeing up the No 7 shirt, with Jadon Sancho - who donned the number for Borussia Dortmund previously - another player who could replace Ronaldo.

Fans on social media though responded to Garnacho's photo suggesting that it was 'inevitable' that he gets the No 7.

One person tweeted: 'It's obvious he is the new number 7. He can't even hide it.'

Lee Chisholm commented: 'If he’s not no.7 why is he shouting about it so much?'

Garnacho enjoyed an impressive breakthrough season for the Reds Devils in the most recent campaign.

He made 34 appearances across all competitions and netted five goals.

The youngster will be hoping to take his game to another level, when United get their season underway next month.