The Schalke 04 man was forced off after 39 minutes after suffering what looked like a thigh injury, prompting concerns that his tournament may be taking a premature end.
The 22-year-old, however, sounded calm and optimistic after the match, revealing that the injury is not a thigh problem as earlier reported.
"I twisted my knee twice in the space of five minutes" Baba told Goal. "I have some pains but at this moment, I think the pain is going down.
"But we still need to do some scans and see what happens."
Andre Ayew's 32nd-minute penalty was all Ghana needed to claim maximum points at Stade de Port-Gentil.
The Black Stars face Mali in their next game on Saturday, but coach Avram Grant is not yet sure of Baba's availability.
"About Baba we need to wait and see, I don't know," Grant told pressmen after the game. "It's 50- 50
"We will see in the next day what will happen."
Baba played a crucial role as Ghana reached the final of the Afcon in Equatorial Guinea two years ago, having made his debut for the national side in 2014.