Estevao suffered a hamstring injury as he was substituted on 16 minutes.
Rosenior said: "He was crying at half time; it was really devastating for him.
"It looks like it's his hamstring and that has happened in a moment when he's running through on their goal for a one-v-one chance – he pulls his hamstring in that moment. I hope Este comes back sooner rather than later."
Midfielder Enzo Fernandez also broke down and was taken off on 88 minutes.
Rosenior added: "I’m hoping it's cramp; he’s getting work on it right now because we want him, obviously, fit for Tuesday (against Brighton).
"He ran himself into the ground for the club tonight and I expect nothing different from a man of his stature and quality."
