Kevin Gallacher – who played alongside Ferguson for Scotland – says there is a similarity.
Kevin Gallacher: "The kid's awesome – you just hope he realises what he's got.
"He's just phenomenal – he's a handful. He reminds me of big Duncan Ferguson at times.
"Nobody could handle Duncan in the air, and Andy's the same, but Andy's got a massive engine and he can run up and down the park day,
"If he can curb that and keep his energy for the final third, he's got a great chance for the future, because we know he can score goals.
"England are looking for a big target man, and on that performance, you wouldn't bet against him."