Andres Iniesta says the booing of Barcelona players Sergio Busquets and Gerard Pique by their own fans is "not pleasant".

The pair were jeered by Barca supporters at Camp Nou when being substituted onto the pitch in last month's win over Villarreal, with their refusal to take pay cuts thought to be the reason for the negative reception.

Barca head coach Xavi spoke out against the booing after the game, and Iniesta has joined his former midfield partner in being displeased with the fans' behaviour.

"It is something that no one likes and does not like, regardless of whether they are colleagues or friends," Iniesta, who ended his 20-year association with Barcelona when joining Japanese side Vissel Kobe in 2018, told AS.

"That your fans whistle you is not pleasant but we know that Barca is a very demanding and particular club. These are situations that have occurred throughout history with great players and people express what they feel at that moment.

"Both Busi [Busquets] and Geri [Pique] are at Barca because they still have the ability to perform, that's how it is. We would all like this not to happen, even those who whistle, because if they do it is because of the club's level of demand."

Barca are second in LaLiga, just a point behind rivals Real Madrid, but another early exit from the Champions League means their wait for a first European title since 2014-15 goes on.

Iniesta believes there is something missing from Xavi's side, adding: "I want Barca, and the people I know and appreciate, to do well.

"Since Xavi came in, the evolution has been very positive and the current squad is super complete in all lines, but there are things that happen and the Champions League is decided by details.

"It is clear that some things are not being done well or not enough to change that dynamic. We haven't been able to handle those details that I'm talking about and that decide play-offs and matches."