Neil Lennon believes Celtic are on strong ground for their appeal of Scott Brown's enhanced suspension after the midfielder's sending off against Barcelona earlier this month.

Brown's automatic one-match ban, issued for kicking Neymar, was increased to three by Uefa. Celtic are contesting that, with a date for the hearing yet to be confirmed.

Lennon has studied the written reasons behind his captain's suspension and is confident of having it overturned. Brown's return for the crucial meetings with Ajax and Milan would hand Celtic a further boost after they defeated the Dutch champions 2-1 in Glasgow on Tuesday night.

"It is quite vague," said Lennon of Uefa's detail. "I am not convinced about the wording of it. I think we have got a good case to appeal it."

Should Brown's absence be confirmed, Lennon at least has solace in the form of Beram Kayal. The Israeli midfielder was an instant revelation after joining Celtic in 2010 and has been linked with a series of English clubs. Injuries and loss of form subsequently saw Kayal marginalised but he returned to prominence with the second of Celtic's goals against Ajax.

"I don't think you ever lose it," said Lennon. "Physically you can lose it because injuries take their toll. And maybe that has been a little bit of the case for Beram. But in pre-season he started looking like himself, then he had a hip injury and a groin injury which kept him out for a month. The start of his season has been a little bit disjointed. I felt on Saturday at Hibs he was starting to look a lot better and that goal [against Ajax] will have given him a massive shot in the arm.

"I think he always believed he could do it, that he just needed game time. But last season with Victor Wanyama playing so well, and Joe Ledley and Charlie Mulgrew, competition was pretty fierce in there. Now it's his time and he has maximised the opportunity."

Lennon added: "If Brown's suspension holds up then I am going to need him. Beram looks after himself, he works really hard. He is a good professional. He has been desperate to re-ignite his form and I think he has done that. That will give him, everyone, a big lift."

Tuesday's result hauled Celtic back from a position where they could have been consigned to also-rans status in Group H. They now retaining hope of qualifying for the last-16. Celtic face Ajax and Barcelona away from home and Milan in Glasgow to round off their section.

"I just wanted to win the game for my own reputation, the club's reputation, the players' reputation," added Lennon. "It has given us an opportunity now to go forward in the group. I think we can give any team a game at home. Now it is really important, if we want to make the top two places, that we pick up something away.

"In the Nou Camp that is going to be really difficult, but we are really going to look at Amsterdam and think: 'Can we get something there?' I saw enough in the game to suggest we can, but I also saw enough in the game to suggest it is going to be really difficult because they are a very good side."