Sunderland midfielder Chris Rigg has a competitiveness that boss Tony Mowbray believes has helped inspire his impressive rise at the age of just 16.
Rigg has been named in the England Under-17 World Cup squad, having already scored two goals in seven games for the first team this season.
He is also the club's youngest outfield debutant, at 15 years and 203 days.
"He is this warrior-like character, a personality and internal mechanism," Mowbray told BBC Radio Newcastle.
"He wants to win every tackle, every 5-a-side, every contest he's in, which is pretty unique in a footballer.