Manchester City boss Pep Guardiola criticised his side's performance, despite thrashing Newcastle to record an eighth successive Premier League win.
The league leaders were gifted a fifth-minute opener as Newcastle defender Ciaran Clark failed to attack Joao Cancelo's hooked cross and Ruben Dias had a simple task to head City ahead.
City doubled their lead in the 27th minute when Cancelo collected the ball 35 yards out, beat two Newcastle players and fired an unstoppable strike into the top corner from outside the penalty area.
However, Guardiola was angry with his side's opening half at St James' Park.