The 19-year-old Arsenal loanee joined the action in the 55th minute at Molineux after Paul Robinson had been sent off.
Up until his controversial dismissal, Robinson had been excellent in the centre of defence alongside Ryan Shotton and Josh Dacres-Cogley.
Robinson's red card was subsequently rescinded, meaning that the veteran defender is available to play against the Whites at St. Andrew's.
But with Bielik's display at Molineux, plus the return from injury of Jonathan Grounds, Zola has some defensive decisions to make.
"Krystian did very well, but so did Paul while he was on the pitch," said Zola.
"I will decide depending on who is the best for the game tomorrow, not because I have to play one or the other for other reasons."
Zola continued: "A lot of people may have been surprised how good he (Krystian) was, but not me or my coaches.
"From the very first day we saw his personality and ability and the way he’s so calm with the ball.
"So far he’s played the whole game against Preston and the 35 minutes the other day.
"But even against Preston after the first 20 minutes he was very good and got better and better so I know I can rely on him.
"And amongst the other players he’s getting a lot of respect.
"Whether he is going to play tomorrow or in the next few games we will wait and see."
The Blues boss also has other selection decisions to make with the return of other injured players.
"Jutkiewicz (Lukas) and Grounds are both fit.
"Also, Jacques Maghoma is fit, but whether he is ready to be involved in the team I don’t know?
"Clayton Donaldson should join the team next week, so things are turning good."