Carlo Ancelotti has accepted criticism from whistling fans at the Santiago Bernabeu, agreeing with them that Real Madrid need to play much better.

This isn't the first time Ancelotti has experienced a 'pitada' during a match - the first time was during Madrid's 1-0 defeat to local rivals Atletico at the weekend.

At half-time during Wednesday's UEFA Champions League win over FC Copenhagen, the Blancos boss received critique from the fans after a slow start. His side would go on to win the game 4-0.

Speaking to reporters after Wednesday's game, Ancelotti said he understands the supporters' frustration with the team.

He said: "I was not happy at half-time either because we began playing slowly. The rhythm must be much quicker and we had to play more simply because we have the quality to play that way."

The former Chelsea manager added that he believes being whistled isn't a bad thing, and can actually be considered as necessary to aiding the development of a team.

Ancelotti has also faced criticism over changing the formation of his side for Madrid's fixture against the Danish minnows.

Madrid lined-up in a 4-3-3 formation, with Luka Modric, Asier Illarramendi and Sami Khedira in the centre with Angel Di Maria and Cristiano Ronaldo as ‘inside-out’ wingers - slightly different to the 4-4-2 Ancelotti had previously insisted on for this season.

The Madrid boss is quoted on ESPN as saying: "We changed because the opposing team were very compact.

"Cristiano and Di Maria played more open to have more chances to cross. The first two goals came from good combination moves and we used the flanks well. Illarra, Khedira and Modric did a good job."

The tactical changes come as Marcelo Vieira returns from a month out through injury, and have allowed him greater movement around the pitch.

"He is a very important player, he has different characteristics to Coentrao, who is also a very good full-back, but it is true that Marcelo in incredible on the attack," Ancelotti added.

"When you play in this system, the work of the full-backs is important."

Real Madrid's next Champions League clash sees them take on Juventus - who came up trumps in their last two meetings back in 2008 with a 2-1 win in October, and a 2-0 win later in the competition.

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