Bayern Munich coach Carlo Ancelotti returns to Real Madrid tonight with criticism of president Florentino Perez and the board back in the local press.

Ahead of the Champions League quarterfinal second-leg, the Madrid and Catalan media have published extracts of Ancelotti's recent book, 'Quiet Leadership: Winning Hearts, Minds and Matches'.

Discussing his final days with Real, Ancelotti wrote there were two issues which saw him fall out with Florentino.

"The first was caused by UEFA statistics that 'revealed' that the team did not have as many hours of training as other European clubs. We had won 22 straight games so we should be doing something right ... But we just lost when the statistics came out, and the club pressed: 'We have to work harder'. I thought the opposite.

"The players had to rest, we had a month of injuries and fatigue that was crucial to losing the League. The statistics was a sign that Madrid had more faith in numbers than in my work ... "

Ancelotti also revealed an episode involving Gareth Bale which changed forever his relationship with the president.

"Bale's agent complained that Gareth wanted to play in the centre, the president asked me what I was going to do and my answer was: 'Nothing'.

"We could not change the system mid-season. The president was not the same again."