Lennon said it is vital that the club rewards players such as Kayal and admits that the player will be offered a more lucrative deal to the current one which has three years remaining.
"Kayal was world class and he and Scott Brown were magnificent from start to finish. We've already said we will speak at the end of the season and reward him for what he's done. He was great," said Lennon.
"Kayal and Brown had to cope with three United players in midfield because we wanted to play with width.
"They had to work hard and the effort, strength and power they bring to the team is fantastic. It is as good a midfield as we have had for a long time here."