Erasmus has played very little football over the past three years following stints at French sides Stade Rennais and Lens, Swedish outfit AFC Eskilstuna and Portugal's Vitória Setúbal.
However, the 28-year-old got some welcome game-time in City's victory over ex-employers Matsatsantsa, which was secured by Gift Links's 89th minute goal in Tshwane.
"I am satisfied but not entirely happy," Erasmus said.
"If you look at the final third, I think I could have done better. But it's my first game after let's say a year.
"I am happy to get a chance to play again. I had a little bit of a strain but I kept on going because I have not been playing for a year.
"I just want to enjoy myself and be on the field of play."
The former Orlando Pirates hitman was seen limping after the match but insists he will be ready for this weekend's clash with Baroka in Cape Town.
"It's not too bad. It's a small strain. I will be back [for the] next game against Baroka."
Erasmus penned a three-and-a-half-year deal with the Citizens in December.