He said: "If Jerome keeps playing like he has done recently then we've got a very good striker on our hands.
"We all know he has got blistering pace and power which you need at this level and at his best he is a handful for everybody.
"But it is repeating it regularly. That's what Premier League players do. They are capable of reaching a level and sustaining it.
"It's okay doing it one week or two weeks. You've got to do it every week as well."