With safety secured following a superb victory at Aston Villa, Wigan close the season at home to league leaders Manchester United on Sunday.
"Steve is a very honest man," Whelan said. "He speaks his mind and says what he has to say to the players. "He knows the game and gets respect from them, which is the most important thing. Certainly the dressing room has been buzzing all week as the players are determined to unsettle United."
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