If the build-up to the first game between Real Madrid and Tottenham focused on Harry Kane, then the second meeting on Wednesday night at Wembley is very much being seen in Spain as the Dele Alli test.
There is a concern that if Tottenham almost defeated Real at the Bernabeu without the England midfielder, they might be able to go one step further with him in the side.
'He is the big young English talent,' said Diario AS resident European football expert Julio Maldonado. 'He is intelligent, he scores goals and he has a great understanding with Kane and [Christian] Eriksen.'
Dele Alli is expected to star after missing previous Real Madrid clash through suspension
The Spanish papers previewed the clash between Tottenham and Real Madrid on Wednesday
Marca was no less emphatic with an editorial that read: 'The Wembley lights always focus on Harry Kane but tonight Real Madrid will come up against one of the players who is destined to reign on planet football for the next decade.'
There is also a vague suggestion in the piece that Madrid are following Alli closely.
If he stars on Wednesday — and with former Real Madrid star Steve McManaman suggesting in Marca that president Florentino Perez should not try to sign Kane because at €200million (£175m) he is too expensive — interest in Alli will start to grow.
The way Alli fits into Mauricio Pochettino's 3-4-2-1 system is also a major concern for the Spanish giants. They have faced teams playing three centre-backs and wing backs before this season and on each occasion they have suffered.
It happened against Spurs a fortnight ago and at the weekend when Girona beat them 2-1 with a masterclass of exactly how to play the wing-back system to perfection.
There is a concern that Spurs full backs Kieran Trippier and Danny Rose can do to Real Madrid at Wembley what Manchester City loanee Pablo Maffeo did to them at Girona's