Manchester City boss Pep Guardiola believes their individual and collective quality got them through a tough FA Cup game.

The Citizens had to work hard for their goals in a 2-0 success over Peterborough United on Tuesday.

The result moves City into the quarter-finals of the competition, thanks to goals from Riyad Mahrez and Jack Grealish.

"We are in the next round and in the end, the quality of our players made the difference," Guardiola declared post-game, per the club's website.

"They were brilliant goals. The quality of Riyad and the second goal the same. It was good.

"We created chances. All of them were brilliant.

"Riyad always had this quality in the final third - he is the best we have. He scored a fantastic goal. So proud of the game he played.

"The pass from Phil (for the Grealish goal) was excellent - the control was excellent from Jack.

"He was aggressive in the final third and is back from injury and played a really good level."