West Ham attacker Andriy Yarmolenko has quickly been impressed by new teammate Sebastien Haller.
The former Eintracht Frankfurt striker is already amongst the goals in England.
Yarmolenko told sport.ua: "Yes, he's a good forward. He was paid a lot of money and from the first matches he shows his level. This is a great purchase.
"Hopefully he will score many more goals for West Ham."
On who has the greatest potential, the Ukraine international: "Of course, Declan Rice. I think he has a great future."
