Dean Henderson was in inspired form for Sheffield United but substitute Sergio Aguero's goal earned three points for Manchester City.
Gabriel Jesus has missed three of his five penalties in the Premier League, with other Manchester City players also fluffing their lines.
Manchester City were made to work hard for their win over Sheffield United, which came as no surprise to Pep Guardiola.
Competitions need to be trimmed from the calendar not expanded, according to Manchester City boss Pep Guardiola.
Watching Chris Wilder's Sheffield United can help Pep Guardiola to improve as a manager, he believes.
Manchester City, not Liverpool, dominate Pep Guardiola's thoughts "almost 24 hours" every day, he says.
Liverpool lead the Premier League by 16 points and the Opta data from a 2-0 win over Manchester United underlines their dominance.
Paris Saint-Germain are reportedly trying to lure Pep Guardiola from Manchester City.
Pep Guardiola praised Manchester City's fighting spirit in the 2-2 draw with Crystal Palace but was angered by a late defensive lapse.
Sergio Aguero went past 250 goals for Manchester City but a last-minute own goal from Fernandinho gave Crystal Palace a 2-2 draw.