Barcelona (AFP) - Pep Guardiola's legacy at Barcelona will never be forgotten according to Barca defender Gerard Pique ahead of Guardiola's return to the Camp Nou as Manchester City manager on Wednesday.

Pique was a major part of the Guardiola side that won 14 trophies in a golden four-year period between 2008 and 2012.

"Pep made a mark on all of us that were with him, there was a before and after. We understood football in a different way and he changed the history of the club," said Pique on Tuesday.

"I only have complimentary words for him. He gave me the opportunity to come here and gave me everything."

City travel to the Camp Nou without a win in three games as draws at Celtic and home to Everton sandwiched Guardiola's first defeat in England at Tottenham Hotspur.

However, Pique believes City are already a more dangerous prospect than in the four meetings between the sides in the last 16 of the Champions League in 2013/14 and 2014/15 when Barca emerged victorious on all four occasions.

"I think Manchester City is a different team from last year or the years they came here with (Manuel) Pellegrini," added the former Manchester United man.

"The style of play is different. They pressure a lot really high, they try to have the ball and create chances and I think they play like us because Pep Guardiola was here many years.

"He understands football the same way we do. It will be a really challenging game."

Barca hold a two-point lead over City at the top of Champions League Group C.

Pique believes victory will prove a "gigantic step" not only towards qualification for the knockout stages, but also topping the group ahead of his former boss.