Wigan Athletic boss Roberto Martinez is at the Euros this month to check on six transfer targets.
Chairman Dave Whelan says he has already identified six players to look at - and will be on the look out for more.
Whelan told the Wigan Evening Post: "Roberto is looking for players.
"He'll be watching quite a lot of football over there.
"He's got half a dozen on his list that he wants to look at and he's always looking at other players.
"He's always working. He never stops working."