Son appeared to be tripped by Leicester defender Harry Maguire in the first half but Oliver brandished a yellow card to the South Korea worldwide with replays showing Maguire's boot had made contact with his shin.
Puel has reportedly lost the support of several influential players, including England striker Vardy, who was left on the bench for the first 60 minutes before coming on to miss a penalty with his first touch.
Lloris, Trippier, Sanchez, Vertonghen, Rose, Winks, Sissoko, Skipp, Eriksen, Son, Llorente.
Harvey Barnes produced another tame finish when sent through on goal by Vardy, before Pereira made amends for his earlier error by sending in a low cross that Vardy flicked past Lloris.
What does it mean?
"I think we are talking about one of the best 'keepers in the world, with a lot of experience and having played a lot of games here at Tottenham", Pochettino told his post-match press conference. Leicester will believe they can cause another upset. He wasted a number of good opportunities with poor shots or final passes.
"The effort was fantastic, with the circumstances that happened in this game and also this season".
- Tottenham against Leicester has now joined the Sheffield derby as the most played top-flight fixture without ever recording a goalless draw (84 meetings).
Pochettino recently claimed that however the season ends for his Spurs players, in his eyes they are heroes.
Since a very well managed and earned win against Everton at Goodison Park on New Year's Day, it has all gone downhill for the Foxes, bringing Claude Puel back into the red zone where he stood before he casually derailed Chelsea and Manchester City's respective Premier League campaigns.