The official Ajax website revealed that former Kaizer Chiefs player Isaacs, who missed three crucial matches against Moroka Swallows, SuperSport United and Maritzburg United has returned from injury.
It was also said that exciting young winger Dolly is set to return. The 21-year old former South Africa youth international has recovered from his niggling injury.
Dolly has had a good season, leading to his name being linked with PSL giants, Kaizer Chiefs and SuperSport United.
Lastly, Soweto-born player Hlatshwayo who missed Ajax's match against Maritzburg United due to an arm injury, is now available for team selection.
The hard-tackling defender will be joining Bidvest Wits at the end of the season, after signing a pre-contract with the Clever Boys.
The trio are expected to start against Celtic. The Urban Warriors will be looking to do a league double over Siwelele after beating them 2-1 in the first round league encounter.