Gianluca Vialli on 'breath-taking' Gaelic football: 'The pitch looks like an airport to me!'

Italian football legend Gianluca Vialli has been impressed by the "unbelievable" fitness of Gaelic footballers.

The former World Footballer of the Year, who is managing Erin's Isle as part of AIB's The Toughest Rivalry series, says GAA players require an all-round fitness to cover the ground, even with 15 men on the field.