Bale has now scored 10 goals for club and country this season - and Andre Villas-Boas admits the biggest teams on the planet will have been alerted by the winger's form.
"Tottenham as a club want to keep him here as long as we can but we understand players like this have propositions, have market which is the nature of the game," the Spurs boss said.
"At the moment he's doing extremely well for Spurs and we are absolutely amazed with what he can do for us. Hopefully, we have no doubt he can become a top player in the future. He is on to a great career."