Europa League - UEFA: Celtic decision on Friday
UEFA will decide on Friday whether Celtic should be reinstated in the Europa League at the expense of Sion.
UEFA has confirmed its control and disciplinary body will meet at 4pm British time to "deal with the two protests lodged by Celtic FC".
Celtic played both legs of their play-off defeat against the Swiss side under protest over their opponents' alleged breach of a transfer embargo.
Captain Brown has no doubt that Celtic should be taking Sion's place in a group which includes Atletico Madrid, Udinese and Rennes.
"Yes, I think we should be," said the Scotland midfielder. "They played three players that shouldn't have been allowed to play and at the end of the day you can't do that, and hopefully UEFA see that as well."