Arsenal boss Arsene Wenger was delighted with the performance of his team after the 3-1 win against Sunderland in the FA Cup.
The Gunners have now extended their unbeaten run in the competition to 13 games.
And the Frenchman says his side are determined to complete a hat-trick of FA Cup titles.
"When you play a Premier League team you are always going to have to work," Wenger said.
"We had a very convincing half and took over more slowly. In the first half we went one down and we had to find our way because we were sharp in midfield.
"After that slowly in the second half we took over, played in their half and scored great goals and created many chances.
"We have only one left to win [to make a hat-trick of FA Cups].
"We have done it twice. What I will say is we take this competition with a desire to do well in it and to try to win it. It is a long way in the cup and you need a long run.
"I liked the timing of his [Alex Iwobi] passes. In the middle of the park that is a vital quality and that fact he plays forward and sees [things]. As a young boy he is not afraid to come on and that is not easy.
"He [Hector Bellerin] became stronger and stronger. Sometimes I felt in the last 20 minutes, every time he went forward he created a chance on goal.
I don't know [if there is a better right back in the league]. Of course [he is among the best]. Look at the defensive and offensive numbers. The fact that he is only 20 years old, there is a lot more to come from him."