Earlier story about him on Skysports
Chelsea have been linked with a move for Afonso Alves, after Piet de Visser travelled to watch him action for Heerenveen against Willem II.
De Visser, one of Roman Abramovich's top advisers, saw Alves score a hat-trick in Heerenveen's 3-1 victory.
The Brazilian, who joined Heerenveen from Malmo last summer, is the Eredivisie's top scorer with 29 goals from 29 games.
However, de Visser was less than impressed by Willem II's defending and doubts whether Alves would be so prolific in a different league.
"In the Netherlands there is very bad defending," De Visser told Algemeen Dagblad.
"You could have seen it also here.
"Maybe it's just once that he bags 30 in a season."
A striker getting 30 goals in a season for us, once wouldn't be too bad