Leicester squandered a string of chances, though - including a missed penalty from Jamie Vardy - and Pochettino acknowledged that it was a win they ground out without being on top form.
- Tottenham have won 20 league games this season - only in their top-flight title winning campaign of 1960-1961 have they ever won more after their first 26 matches of a season (22).
Christian Eriksen netted moments later and although Vardy got one back, Son Heung-min's late strike ensured third-placed Tottenham the victory.
Jurgen Klopp's men maintain the advantage of a game in hand, but handed a reprieve by Liverpool's draws against Leicester and West Ham in recent weeks, City look determined to become the first side in a decade to retain the Premier League.
Their attention now turns to the Champions League, where they host Borussia Dortmund in the last 16, though Pochettino is unhappy with the scheduling of this game against the Foxes.
Lloris then faced the ultimate test as Leicester were awarded a penalty when Jan Vertonghen was adjudged to have brought down Maddison.
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- Since the start of the 2014-2015 campaign, Vardy has lost 15 Premier League games in which he has scored, more than any other player in the competition.
"When you compare the situation with the penalty against us, unbelievable". The striker had an opportunity to prove himself after being dropped by Claude Puel.
It was not the first time a player has taken a spot-kick in the Premier League immediately after coming on with Wigan midfielder Ben Watson doing so on New Year's Eve in November 2011, sealing a 2-2 draw.
Tottenham doubled their lead three minutes later as Eriksen collected the ball on the edge of the penalty area and unleashed a fierce shot past goalkeeper Kasper Schmeichel.
That was after a well-worked move allowed Ricardo Pereira to drill in a cross from the right.
Finally piecing together an incisive raid, Tottenham were furious when Son's penalty appeal ended in a booking for diving after Maguire stuck out a leg to halt the South Korean.
Still angry about the decision after the match, Pochettino fumed: "It's unbelievable".