Arsenal FC manager Arsène Wenger has tipped England youth international Jack Wilshere for the top after the 17-year-old, already the club's youngest ever player, signed a three-year professional contract.

Supreme in France for the last seven seasons, Olympique Lyonnais owe much of their success to an excellent youth academy, which has spawned the likes of Karim Benzema and continues to feed the club's future.

Zoran Tošić said he would "not waste the opportunity of being a member of the greatest football family" as he aims to emulate compatriot Nemanja Vidić and become an integral member of Manchester United FC's squad.

Football scouts scour the world in search of that elusive spark of potential, but Manchester United FC's former youth coach Eric Harrison has helped more than one rough diamond become an established star at Old Trafford.

Producing talented footballers over the years has not proved a problem for Sporting Clube de Portugal, but keeping the rough diamonds they have transformed into polished gems at the club is another matter altogether.