United have now won just one of their last six Premier League games and could finish the day 11 points off the top of the table should Chelsea beat Burnley at Stamford Bridge.
Guardiola claimed earlier in the week his side's Champions League game against Club Brugge, which they won 4-1, was more important than the derby given there are 28 league games still to play.
Liverpool recorded their record victory at Old Trafford in a 5-0 thrashing two weeks ago to leave Solskjaer clinging onto his job as United boss.
Ole Gunnar Solskjaer has said that he does not think there was ever a chance of Cristiano Ronaldo signing up with Manchester City.
Manchester United striker Ibrahimovic's comeback has been remarkably quick, given the seriousness of the injury and his age.