"Goalkeeping is just different. Everyone says we're crazy or something, but it's more a case of us working under a different pressure, thinking about the game differently." — Bournemouth's Asmir Begovic.
Few are better placed to testify to the uniqueness of the goalkeeper role than Begovic. A Premier League starter for just shy of a decade and a World Cup veteran, he's been at the forefront of the marked changes the position is experiencing.
Much like quarterbacks are passing more than ever in the NFL, or big men in the NBA are being asked to do more further away from the basket, football has seen certain positions revolutionised in recent years.