MANCHESTER, England (Reuters) - Manchester City manager Pep Guardiola is uncertain whether Erling Haaland will feature in Saturday's FA Cup semi-final against Chelsea after his prolific striker asked to leave Wednesday's Champions League quarter-final with a muscle injury.

Guardiola subbed both Haaland and Kevin De Bruyne off ahead of extra time in a surprise move in City's penalty shootout loss to Real Madrid that extinguished their hopes of capturing the treble for a second successive season.