He's quite magnificently stepped up to the plate in Harry Kane's absence, bagging four goals in four games since returning from global duty at the Asian Cup, meaning he's one of the hottest players in Europe at the time of writing, and Spurs supporters were quick to lavish their hero in praise following his pulsating performance at Wembley.
Pochettino is going to be left with a dilemma and whatever decision he makes is likely to play into Dortmund's hands.
Pochettino's side had been under the cosh as Dortmund dominated the first half at Wembley, but Hugo Lloris kept them level with a series of fine saves.
"I'm so happy for him, he was fantastic today", said the Argentine of his young countryman.
Dortmund's USA midfielder Christian Pulisic (left) and Tottenham Hotspur's Ivorian defender Serge Aurier battle for the ball during the Uefa Champions League first leg match at Wembley Stadium on Wednesday night.
"3-0 is a very good result but at the same time we have to think that we have to finish the job".
"The first half was very hard".
Former US Air Force agent charged with defecting to Iran
Monica Elfriede Witt, a former Texas resident, left the USA military in 2008 after more than a decade of service. But later that year, she helped an unnamed Iranian-American official produce an anti-American propaganda film.
"We were a little bit lucky because when Son scored it was a massive boost to our confidence". (@ChojyK)Can we start talking about Heung Min Son being on the short list for player of the year?
Billed as one of the more exciting last-16 ties, the first leg started off a restrained affair as Spurs resolutely held back the Bundesliga leaders in the first half. That was a gift.
Juan Foyth gifted Dortmund their first sight of goal when he dwelt on the ball too long and was alertly dispossessed by Christian Pulisic.
If Son was excellent, Vertonghen was even better.
'He is a player who provides the team with a lot of very good things.
Suddenly, Dortmund had no answers to Tottenham's high-tempo pressing and it was Vertonghen who was the hosts' unlikely hero in the 83rd minute as he volleyed home from Serge Aurier's cross.
Llorente's header from a Christian Eriksen corner sealed the 3-0 win.