Behind the scenes of Louis Rees-Zammit's 10-week NFL bootcamp: Wales rugby star outlines his 'hardest challenge' as he learn the rules, hits the gym and runs his first routes following shock switch to football

Louis Rees-Zammit has opened up on the 'hardest challenge' he faces en route to the NFL as he is seen learning the rules and ropes of football following his shock switch from rugby.