Y is for...

As uefa.com Action's A to Z countdown to the UEFA Champions League final on 25 May continues, it is time for some great Ys.

During a player's career they will inevitably collect the odd yellow card along the way, but as far as the Champions League goes some players have picked up more than others. uefa.com have hunted down the most booked players in Champions League history.

In joint fourth place, Juventus FC midfield player Alessio Tacchinardi has picked up 19 yellow cards in 71 Champions League appearances, while Real Madrid CF's classy Portuguese International Luís Figo has also picked up 19 bookings. Both are two adrift of FC Internazionale Milano's Edgar Davids, who has picked up 21.

All of the players in the top five bar one are midfield players - the only exception being FC Porto defender Jorge Costa who has clocked up 23 bookings in just over 50 Champions League games. He is just one behind Paul Scholes, whose 24 bookings with Manchester United FC put him into top spot.

Scholes's old United team-mate Dwight Yorke became Manchester United's record signing in August 1998 when he moved to Old Trafford from Aston Villa for a fee in the region of €18m. In his first season at the club he United won a wonderful treble, winning the Premiership, the FA Cup and UEFA Champions League.

But it was in the latter he excelled, opening his European account with a goal against FC Bayern München on Matchday 2. His most vital goals during that season were two in the quarter-final first leg against Inter and another in the semi-final second leg at the Della Alpi against Juventus FC.

It was all-downhill from there for Yorke, and by the 2001/02 season it became clear he did not figure in Sir Alex Ferguson's plans. A series of much-publicised off-field scandals proved to be his downfall. Subsequent spells at Blackburn Rovers FC and Birmingham City FC brought little success.

Over the last few seasons young players have really come to the fore in the UEFA Champions League. The scorer of the opening goal in last season's final was Carlos Alberto as FC Porto beat AS Monaco 3-0. At just 19 he became the third youngest scorer of a goal in a European Cup final.

This season, United's Wayne Rooney made his Champions League debut at the age of 18 and proceeded to score a hat-trick in the 6-2 demolition of Fenerbahçe SK, while Arsenal FC's Cesc Fabregas became the second youngest goal scorer in the Champions League at 17 years 218 days when he scored in the 5-1 win against Rosenborg BK.

The youngest ever Champions League scorer was Peter Ofori-Quaye who scored after coming on a substitute for Rosenborg in a 5-1 win over Rosenborg BK at 17 years and 195 days old in the 1997/98 season.