The sought-after winger has been the subject of much praise after scoring three goals in as many games for club and country in recent weeks, with Spurs team-mate Jan Vertonghen claiming the 23-year-old "could play for every team in the world".
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40/1 | Tottenham are 40/1 with bet365 to draw 3-3 with Newcastle on Saturday |
Earnshaw told talkSPORT: "Sometimes you just think that he can be unstoppable and he should, in the next year or so, move to Real Madrid or Barcelona.
"I want to see him at that level and I think that will take him on to a different stage again because he’ll improve again.
"He’s been at Tottenham for quite a while but sometimes it’s nice to see people do well and go higher, and reach the top. There is no higher place than Real Madrid or Barcelona."