Roberto Soldado and Erik Lamela were among the goalscorers as Tottenham thrashed Celtic 6-1 in Saturday's friendly in Helsinki.
Spurs raced into a 2-0 lead thanks to efforts from Harry Kane and Soldado.
Jamie Lindsay pulled a goal back for Celtic in the 43rd minute, but just a minute later Lewis Holtby restored the two-goal cushion and Tottenham kept the momentum going after the break.
Lamela - who, like Soldado, is looking to bounce back after a disappointing first season with the London club - made it 4-1 just before the hour mark.
A Christian Eriksen free-kick and Emmanuel Adebayor penalty wrapped up the rout in the last 10 minutes, while Celtic's misery was compounded by a red card for Efe Ambrose - his second this week, having been dismissed in Wednesday's Champions League qualifier against Legia Warsaw.
