The first-half was hard for the team to start to play and feel confident in how we planned to play.
Pochettino did, however, hail his team's resilience as they mounted a second-half fightback.
Here, we pick out three main talking points to arise from the game.
Live Stream: You can stream the game on fuboTV.
Another poor decision from the French World Cup victor gave his side a mountain to climb as he raced from his goal and got caught in no man's land when Jordi Alba teed up Coutinho for the opener. Then Davinson Sanchez's cheap giveaway led to Coutinho keeping the ball in play as Rakitic hammered home a stupendous volley which will live long in the memory.
The Barcelona supporters sang his name, the scoreline was shaped by his feet and intelligence and Spurs now find themselves facing a battle to stay in the Champions League.
"The Champions League is the icing on the cake for everyone", he said after the game. Sure, they missed the pace and dominant aerial ability of the suspended Samuel Umtiti as Harry Kane in particular bullied their back line in the second half.
MESSI was in spectacular fashion and every where on the pitch for Barcelona. When you're scoring as many goals as he is - 40, 50 or 60 goals a season - as a striker, I want to try and match that. "We had a few problems during the game but we managed to solve them".
Kane did his job, as he usually does, in holding the ball up and trying to bring others into play, but when he dropped deeper to lay balls off, neither Eriksen or Alli were there to link up with him.
The double-pivot central midfield duo of the hectic Victor Wanyama and overshadowed Harry Winks were situated just in front of the back four.
On the site of two of Barca's greatest ever triumphs where they won the European Cup in 1992 and 2011, Ernesto Valverde's men dispelled any doubts caused by a three-game winless run in La Liga.
Barcelona ran out 4-2 winners in the end at Wembley but Spurs almost forced a famous comeback after clawing the game back to 3-2.