It's a sign of Manchester City's incredible level this season that a 3-1 win over a major rival like Arsenal was met with a "could do better" assessment by manager Pep Guardiola. Playing four days after an energy-sapping 4-2 win at Napoli in the Champions League, City wasn't as fluent as usual but still swept past Arsenal at Etihad Stadium to make another statement heading into the international break.