Vertonghen is also not due to be available again for Tottenham until next month as he continues his recovery from a thigh injury while Wanyama is still working his way back from a long-term knee problem.
Pochettino admits there was stronger public support for Leicester's shock title charge in 2015-16 than there was for Spurs, but he does not expect any team to earn any favours in this term's tough battle.
"Yes, for sure, it's obvious - the same situation as Jan (Vertonghen)", said Pochettino when asked if he meant to trigger the extension.
Tottenham head in to the weekend action sitting second in the Premier League table after scoring 11 goals in their last two games so Pochettino will be looking for a win to reduce Liverpool's gap to three points ahead of their clash with Arsenal.
"I told Daniel (Levy) when he asked me, but you know he is so anxious about such things".
"Dele yesterday was involved in the squad but after was out of the 18".
"We are there because we have the belief, because we are working hard and of course we have the quality", he said. "Then we can talk that we can fight for big things".
With the January transfer window imminent there will be focus on whether Spurs make any signings, given they did not do so last summer.
A few names have come forward for the lucrative role but the name of Mauricio Pochettino seems to be shining the brightest. We go to compete, play, realising what you have to do, stick to your tasks, have a game plan and play the game.
Foyth is still a highly-rated defender that appears to be going from strength to strength every time he plays and has now featured six times in the league.
"It's going to be a place where the fans can help the team to achieve more".