For their FA Cup win over Sheffield United, Mahrez made his return to the starting line-up - and was back at the King Power Stadium - for the first time since going AWOL after the collapse of his proposed transfer to Manchester City.
"It's behind us," said Leicester boss Puel. "Riyad came back with high quality and it is a good feeling for us of course.
"It was good support from the fans to Riyad and important to remain a good feeling for the future.
"I said before it was important to remain united after this situation but it was good in the end to see the good feeling.
"The most important thing was to win the game and to see again Jamie and Riyad play together is a good feeling. Riyad was a little frustrated at the end of the game because he wanted to score, but that is good."