Welsh legend John Toshack believes Tottenham need a top four finish to keep Gareth Bale.
Toshack fears that the player will move if Spurs don't qualify for the Champions League.
"What could be crucial for Gareth is the Champions League," said Toshack, "it becomes very difficult for a player like him, at the age of 23, not to take that into consideration.
"I would imagine that, should the opportunity present itself, that it would be very terrible not to do it and look back upon that with regret at what might have been.
"I think Tottenham will have a big job keeping hold of him if they don't secure Champions League football."