Harry Kane scored the only goal as Tottenham overcame Real Madrid 1-0 at the Allianz Arena in Munich.
The 26-year-old's calm finish after 22 minutes was the difference as Mauricio Pochettino's men earned a deserved victory after an impressive performance.
Both managers fielded strong sides for the game, with Christian Eriksen and Danny Rose both starting despite speculation linking them with moves away from Tottenham.
Tottenham looked sharp in the early stages, moving the ball quickly and directly through the middle.
They nearly went in front when Raphael Varane was spared his blushes by his goalkeeper after nearly diverting Danny Rose's cross into his own goal.
Seconds later, Navas was called into action again to deny Erik Lamela, coming out bravely to block the Argentine's effort.
But the Costa Rican was powerless to prevent Spurs from taking a deserved lead just three minutes later.
A wayward pass from Eden Hazard sent Marcelo scurrying towards the touchline. The Brazilian, in his attempts to keep the ball in, lofted it back towards his goal and he could only watch as Harry Kane intercepted the pass and slotted beyond Navas.
It was another horrible and needless mistake at the back from Zinedine Zidane's side as they showed their defensive vulnerability again.
Kane should have doubled his and Tottenham's tally on the half-hour mark after a lovely floated pass from Lamela, but the England striker was denied by Navas.
The second half died down after various substitutions from both sides but Dele Alli, on at the interval, brought things back to life. The midfielder ran in behind Sergio Ramos after a sublime ball over the top from Lucas Moura but volleyed straight at Navas.
The 23-year-old then had an opportunity to score again with a pinpoint diagonal from Kyle Walker-Peters but fluffed his lines in front of goal.
Heung-min Son nearly added a second with a curling effort from the edge of the box only to be denied by a fine flying save from Navas.
Real thought they had grabbed an unlikely equaliser after teenager Rodrygo volleyed past Hugo Lloris, but the flag went up against the young Brazilian for offside.
Seventeen-year-old Troy Parrott nearly scored a memorable goal in the closing moments but the Irish starlet was unfortunate to see his low effort strike the post, as Spurs savoured an impressive all-round performance.
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