Chelsea won 5-0 in Ukraine to reach the Europa League quarterfinals.
"We started very well," Sarri said.
"We wanted to start in this way because it was important to score after the result in Stamford Bridge. We were able to score after five minutes. For the opponent it was a difficult situation.
"We played a very good first half. In the second we managed the result. It was a wonderful performance for 90 minutes."
Sarri felt for Dynamo given their lack of experience.
"The problem in this moment of the season for Dynamo is that they are not in the top physical condition. Maybe two years ago they were better, but in this moment they are very young with a really great future."