Stubbs said: “He looks like he is going to be a comfortable 15 goals-a-season man.
“But 15 has to be the minimum figure he is aiming for. I am sure he is capable of doing that and we have struggled for someone to score 20 goals a season.
“We need someone to do that regularly and hopefully Andy will be the man.
“Strikers are judged on goals and Andy should be happy with the way things are going for him. We are playing well and he is doing the business.
“He is getting better – he is a great finisher.”