The 21-year-old, who is expected to feature in the Group A game in Greece, insists that Harry Redknapp has included enough good players to snatch three points from the Super League side.
"The crowd will get behind their players and when you go to an away game it's important to quieten the crowd,” Walker told the club’s official website.
"We have the players to do that. We have come here to win. We don't play to draw or lose. If we play to our ability and to how we have been taught to play then there is no reason why we can't get the result."
The defender is one of a host of young players expected to start in Greece tonight (Thursday).