And Pochettino took the chance to enjoy some downtime in the evening by attending the game.
He was also present on Tuesday evening at Barcelona’s UEFA Youth League clash with Hertha Berlin.
The Argentine was alongside his goalkeeper coach Toni Jimenez and friend Ivan de la Pena.
A document later emerged with a host of Barcelona’s guests and Pochettino was in good company.
Tottenham boss Mauricio Pochettino was in the crowd for Barcelona vs Lyon (Image: Twitter)
Mauricio Pochettino and Tottenham are in Barcelona for a training camp (Image: GETTY)
Mauricio Pochettino was spotted leaving fans confused as to why the Tottenham boss was in the crowd (Image: GETTY)
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Besides the officials from both clubs, Luis Enrique was also in attendance alongside Danny Cruyff, the wife of Johan.
Pochettino has made it clear in the past that he will never manage Barcelona due to his allegiances to Espanyol.
"I am so clear," Pochettino said.
"I am never going to be manager of Barcelona or Arsenal because I am so identified with Tottenham and Espanyol. I grew up in Newell's Old Boys and will never manage Rosario Central.
Mauricio Pochettino was among the guests of Barcelona vs Lyon (Image: Twitter)
Spurs: Pochettino is ‘frustrated’ in his position claims McGarry
"That is my decision because I prefer to work on my farm in Argentina than in some places. But my commitment is massive in this club. I am working like I am going to be here forever.
"But in the end, it is like the players, you never know what is going to happen in football. It is a lot of rumours about this, about that.
"Tomorrow [Tottenham chairman] Daniel Levy could have a bad night and say, 'Oh I am going to sack Mauricio'. And then I look stupid saying I am not going to work in one place or another or another.
"You never know in football. That is the problem. It is a very unstable situation."