Pep Guardiola believes Erling Haaland will find his form so long as the rest of his Manchester City team-mates raise their game but has not ruled out January transfer window signings as he looks to revive the Premier League champions' fortunes. City are enduring a slump unlike any Guardiola has known in his celebrated managerial career, having lost eight and won just one of their last 11 games in all competitions. The downturn has seen the usually prolific Haaland, a key figure while City were winning an unprecedented four successive Premier League titles, denied of service and chances while scoring just once in his last five appearances.