Speaking to Sky Sports, Aufhauser said: Rene Aufhauser, who previously coached both Haaland and Sesko at Salzburg, said: “Erling Haaland, I will rate him 10 out of 10.
"I think Erling is [an] outstanding striker, and Benji, I think at the moment, maybe he's a nine, nine and a half out of 10. And he has also potential. He will develop in the next one and two years, I'm sure.
"Erling reached his mark after his transfer from Dortmund to Man City and we will see. I am quite sure Benji will reach this mark after one or two years. But of course, Erling is the top. He has 10 out of 10 from me.”