The Blues became the first visiting side to keep a clean sheet at the Camp Nou this season.

BBC: Hiddink pays tribute to defence

"No matter who we play, it's good to get five goals and for defenders to keep a clean sheet, " he said.

BBC: Hoyte targets Championship title

"It was important to get back to basics today and keep a clean sheet after slipping up at Motherwell last weekend, " explained Commons.

BBC: Johan Mjallby not worried about Neil Lennon's future

We had hoped to keep a clean sheet and if we had gone in front I think we would have won the match.

BBC: Ferguson plans reshuffle

You want to be hard to beat and keep a clean sheet but you also want to go there to try to get a result.

BBC: McClaren turns to game in Russia

The UK's All Party Parliamentary Group on Aids, HIVsport, which raises awareness of sexual health during sporting events, and the Foreign Office has launched advice website Keep a Clean Sheet.

BBC: Aids and HIV warning to South Africa World Cup fans

Villa are struggling in the Premier League, only one point above the relegation zone, and have failed to keep a clean sheet in each of their last 10 league games - of which they have won only two.

BBC: Aston Villa sign Spurs defender Kyle Walker on loan

But, given the recent defensive fragility that has undermined his side's title bid, City boss Roberto Mancini will no doubt be satisfied to have a clean sheet to go with the three points that keep the Blues in touch at the top of the table.

BBC: Man City 3-0 West Brom