“It was important to win and luckily we did,” he told Rai after the match.
The 33-year-old was benched for the game against the Neroverdi with 16-year-old Donnarumma taking his place and, after a good game for the youngster, Lopez has praised him highly.
“The game seemed to be going downhill after the penalty but it didn’t,” he said.
“I thought Donnarumma play well.
“He is a great guy and is the future of Milan and Italian football.”
Milan are in tenth place in the Serie A table ahead of their next game at home to Chievo on Wednesday night, while Sassuolo are in seventh.