Brian O'Driscoll highlights three players he feels will make an impact for their sides.
Alexandre Fischer: Clermont & France
As a youngester he was a talented swimmer, athlete and footballer before turning to rugby at the age of 11. The 22 year old was included in the French squad having not represented the U20's
Louis Rees-Zammit: Gloucester & Wales
The 18 year old has set the Premiership on fire this season, having qualified for England through residency but the Welsh U18 rep has had no desire to switch.
Caelan Doris: Leinster & Ireland
The 21 year old has played in two U20 Six Nations campaigns and two U20 Championships, captaining Ireland.