The England defender believes they have the players and the quality to win the tournament, and insists they will be relying on supporters to exceed expectations.
England will be heading to the tournament off an unbeaten qualifying campaign and will be looking to make amends for their disappointment in Euro 2016.
But Walker, who was recently crowned Premier League champions with Manchester City, admits the team and the supporters also have to be realistic.
Speaking on talkSPORT, Walker said:
“I hope we can go as far as we can go but we need to be realistic. To win the World Cup is going to be a miracle.”
The defender has also acknowledged that experience will be key in the tournament and that the team will have to be perform together to achieve their ambitions.
“We’ve got the players to do it. A lot of us play in probably the best league in the world. But have we got the experience going further along in competitions? No, we haven’t. Not in recent years. We need to be realistic. There are a lot of good teams out there and our record in tournaments has not been fantastic.”
The elimination to Iceland two years ago led to a change in managerial duties with Gareth Southgate introducing a new playing system and playing squads. Southgate has opted to give the younger players a chance to play international football, as they have excelled at the highest level in English football.
The Three Lions will also be expected to make it through to the knockout stage of the tournament with Belgium appearing to be the real challengers in their group.