Tottenham's season will be classed as a "massive failure'" if they miss out on a top-four finish, according to Harry Redknapp.
Spurs have slipped to seventh in the top-flight standings after 30 fixtures, five points behind Chelsea in the race for the final Champions League spot.
Redknapp says finishing lower than fourth would be unacceptable for Jose Mourinho's side, who he has backed to lay down a marker by beating Manchester United in their crunch encounter at the Tottenham Hotspur Stadium on Sunday.