It's never been done before but if anyone can, Real Madrid can. Graham Hunter explains their key tasks if they're to retain the Champions League.
Carlo Ancelotti believes the unique ingredients behind Champions League success are "courage, personality, experience and luck."
Maurizio Sarri says the only doubt he has for Wednesday night's Champions League clash with Real Madrid is whether to play three or four forwards.
Martin Ainstein reports from the Bernabeu, as Real Madrid have a few key players returning from injury.
Is Arsenal boss Arsene Wenger destined to enter the history books as the greatest coach never to win the Champions League?