Birmingham City teen Josh Martin is wanted by England's biggest clubs.

The Daily Star Sunday says the centre-back, 15, was given a first-team squad number by former Blues manager Lee Clark and Louis van Gaal's Manchester United are keeping tabs in him.

Martin has been widely tipped to break Trevor Francis' record of being the youngest player to play for the club.

Francis made his debut in 1970 - aged 16 years and 139 days - and Blackpool boss Clark said: "I think before the season finishes, he will play in the first team and break Francis' record. I think he's that good.

"At 15, to be considered for first-team football is an unbelievable achievement and tells you about the player."

Chelsea, Arsenal and Liverpool have also watched Martin.