The Athletic says the Argentine will be in the stands at the Metropolitano to see Atletico Madrid host Spurs in the first-leg of their Champions League round 16 tie.
Pochettino has been linked with a Tottenham return this season, though will be in Madrid tonight to check on Atletico's USA midfielder Johnny Cardoso.
Significantly, Pochettino will attend the game as a guest of Atletico.
Pochettino said last week: “There are always rumours, I'm always linked (to clubs). To Tottenham, just like at one time I was linked to Espanyol, or to other clubs.
“We're focused on the World Cup, on the United States. My contract runs until after the World Cup, so after that we'll see what might happen.
“Open to everything, right?”