Sundowns are set to welcome the continent's most successful club to Lucas Moripe Stadium in the first leg of their quarterfinal clash on Saturday.
The Egyptian side was due to arrive in South Africa today in preparation for the game in Atteridgeville.
Former Free State Stars coach Eymael, who now manages Tala'ea El Gaish in Egypt, has given a little bit of insight into what The Brazilians can expect from Al Ahly.
"Sundowns can beat Al Ahly, the same as Al Ahly can beat Sundowns, it's 50/50," Eymael tells snl24.com/kickoff from Egypt.
"For me the results at home will be very important, certainly important for the second leg. Al Ahly has big players injured like Walid Soliman, also missing in the midfield is one of the midfielders who I can't remember his name and he's very important.
"Their defensive midfield is a little bit solid because they moved the right-back to defensive midfield because as I said before one their midfielders is injured.
"For the rest they have good strikers, good attack but they will miss the experience of a guy like Soliman who has been influential in the competition this season and in the title race [in Egypt], which they are still in.
"Sundowns have a chance. It's Champions League, anything can happen. Two very big teams facing each other but as I said before results will be very important for Sundowns at home."
Sundowns have announced that fans wearing yellow colours will gain free entrance at Lucas Moripe Stadium on Saturday.