City have played Barca four times in the Champions League over the past three seasons, losing on each occasion.
Former Barca boss Guardiola faces his old club in the Champions League, with Messi fit again after he returned from a groin injury.
Claudio Bravo has backed former teammate Marc-Andre ter Stegen to bounce back after the Barcelona goalkeeper came in for criticism.
Luis Enrique was pleased at his revamped Barca formation in Saturday's 4-0 win but refused to say if he'd try the same set-up vs. Manchester City.
Claudio Ranieri explains his squad selection and his hopes for Leicester's midweek Champions League match.
Mauricio Pochettino says Toby Alderweireld will miss Tuesday's Champions League match after suffering a leg injury in the 1-1 draw at West Brom.