The 23-year-old completed his £25million signing on Saturday, signing a five-year contract which will keep him at the club until 2025.
He arrived in north London the same day as Gareth Bale, who rejoined Spurs on a one-year loan deal seven years on from leaving them for Real Madrid.
"Bale has been an idol for me since that game against Inter," he said.
"Since that game in the Champions League I started to follow him, to watch YouTube videos of him and I became a big fan. I bought his shirts, his books - everything about him.
"And now being able to be here with him, in the club that raised him… I showed him on the plane the tweets that I wrote to him, and the pictures that I have from him, and he enjoyed that."