Crystal Palace boss Sam Allardyce has questioned the sale of Dwight Gayle to Newcastle United.
Gayle already has 20 goals with four months left of the season to play still.
Allardyce told the Croydon Advertiser: "That's not for me to say. I've never worked with Dwight so I can't tell you.
"Goals in Championship doesn't relate to goals in the Premier League for some players.
"I saw Abel Hernandez score 20-odd goals to get Hull up last year and he's struggled badly this term.
"Some do make the transition some don't. I don't know what would have been the case with Dwight."