Sporting Lisbon coach Ferreira will keep selecting Norwich signing Van Wolfswinkel
The Dutch striker has committed to Norwich City for next season.
And Ferreira said: "It's not a common situation, but it was a strategy that the club had devised. I expect Ricky to meet the requirements. He has been practically the only striker that Sporting has had in two years and there is no comparison.
"Last season was better than this and hopefully by the end of the championship he can score more goals for the team."