Ruben Diaz and John Stones scored the goals for the hosts as they recorded their 20th consecutive win in all competitions.
Pep Guardiola has revealed that the feat is one of the best he has achieved in his glittering career.
“It is so difficult. Twenty in this period, in this era, with this situation around the world. To be able to do 20 is maybe one of the greatest achievements we have done together in our careers,” Guardiola said.