The 22-year old Danish striker joined Villa from Aalborg for £1.2million in the summer but has managed just six appearances in all competitions with his only goal coming in the FA Cup loss to Sheffield United earlier this month.
"He's not frustrated, that's one thing Nicklas is not. If you watch Helenius finish in training he very rarely misses the target. He's a young guy and he's learning," he told the Express & Star.
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