Pep Guardiola called it 'the biggest f***-up' of his career as Real Madrid ran riot against his Bayern Munich in 2014 - the last time he faced Carlo Ancelotti in the Champions League - so, can the Man City boss outsmart the wily Italian this time?

'I got it wrong man. I got it totally wrong. It's a monumental f***-up. A total mess. The biggest f***-up of my life as a coach.

'I spend the whole season refusing to use a 4-2-4. The whole season. And I decide to do it tonight, the most important night of the year. A complete f***-up.'

These were the most noteworthy lines from one of the extracts published prior to the release of Marti Perarnau's 2015 book on Pep Guardiola called Pep Confidential: The Inside Story of Pep Guardiola's First Season at Bayern Munich.