Follow famous mystery guest's journey to Lisbon

Nyon, London, Buenos Aires, Sofia, Ho Chi Minh City, and on to the final venue Lisbon: a new UEFA Champions League video takes an exciting tour of the world through the eyes of a mystery star.

Ahead of this season's final at the Estadio do Sport Lisboa e Benfica, an icon of the game has compiled a video diary of their journey to Portugal. In the first of six films, you can see them enjoy a meal with a UEFA Champions League-winning coach, and sharing a ride around Vietnam with one of the competition's most prolific strikers. Can you work out who it is? All will be revealed as the trip continues.

In the first instalment, our mystery guest leaves UEFA headquarters in Nyon, takes a walk around London's Trafalgar Square, meets some adoring fans in the Argentinian capital Buenos Aires, and makes a quick stopover in Bulgaria before being greeted by awestruck fans in Vietnam. All of these clues can help you work out the identity of the footballing celebrity that brings delight everywhere they go. And if you cannot solve the puzzle this time, stay alert for the next video.