Just as former club Tottenham were sacking manager Thomas Frank, Pochettino was in London for a friend's birthday celebration.
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Pochettino happily shared his visit on social media as press speculation linked him with a return to Spurs.
While Pochettino intends to lead the USA at this summer's World Cup, he also hasn't ruled out returning to Tottenham in the future.
Speaking recently to Sky Sports, he revealed: "When I left the club I always remember one interview. I said I would like one day to come back to Tottenham.
"I am in the USA, so I am not going to talk about that now - but what I said then I still, after six years or five years, feel in my heart. Yes, I would like one day to come back."