The 17-year-old midfielder, who has signed a five-year contract with Borussia Dortmund worth £60,000 a week in a £30million deal, left the St Andrew's pitch in an emotional state after succumbing to cramp in the 75th minute.
"Jude has a very bright future," said Spooner.
"He is beyond his years mentally and speaks with such calmness and assuredness and has such a thoughtful manner.
"So the potential for things to go wrong off the pitch I don't think will come his way because he is so well rounded and has such a supportive family around him.
"On the pitch the sky is the limit for him. He can play anywhere - it's very hard to pin him down in one position.
"With the player he is and the talent he has he will really blossom over there.
"Seeing him day in, day out, I just don't know how he handles the pressure so well."