Roberto Soldado, Etienne Capoue and Paulinho are all regular faces in their respective national squads while in Erik Lamela, Spurs have signed one of the brightest prospects in world football.
"I think it sends a message to everybody, to all the top four, that we want to be up there and they have to look at us as well and where we are going to be," Vertonghen said.
"There's a lot of competition and the quality of the players is very high here. They have just so much power. I think we have a strong team anyway, whatever happens (with Bale).
"We have bought some very good players and it is always good to have different players who can score."
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