Manchester City boss Pep Guardiola says there mustn't be any underestimating Sheffield United.

Guardiola - who said he watched the Blades' shock win at Manchester United "like a fan" - feels uneasy about Chris Wilder's side arriving at the Etihad Stadium.

Kyle Walker's long-range winner saw City squeezed past them at Bramall Lane earlier in the season.

"This team is still alive and still have something inside,' he added. 'Sheffield is always uncomfortable for us. It is difficult to attack. I am a little bit concerned about the game.

"But we are creating chances and our football is better now. Our decision in the final third, in the middle is better. Our movements are better. It makes more sense."