A freakish penalty "miss" by Leicester City's Riyad Mahrez at the Etihad Stadium allowed Manchester City to squeeze out a 2-1 victory that lifted them to third place, above Liverpool.
For one of the few times this season, Guardiola's side stood up well to a late onslaught. "I've seen that happen before (but) a long time ago".
Manchester City held on to boost their hopes of Champions League qualification.
Goals by David Silva in the 29th minute and Gabriel Jesus, from the penalty spot, in the 36th gave City a 2-0 lead at Etihad Stadium. A teasing cross from Marc Albrighton on the Leicester left found Shinji Okazaki in space in the box.
Manchester City now need four points from the remaining two games against West Bromwich Albion on Tuesday and Watford away on Sunday to be certain of a top-four finish although a win should be enough due to their superior goal difference.
Third-bottom Hull City trail Swansea by four points and will be all but relegated if they do not win at Crystal Palace - who are level on points with Swansea - on Sunday.
Leicester boss Craig Shakespeare bemoaned his side's luck and argued the penalty could have been retaken for encroachment by City players.
Albrighton, in the wars as he suffered two facial injuries, then had a chance to equalise early in the second half from Jamie Vardy's cross, but miscued his effort.
Leicester's players will count themselves unfortunate, however - and not only because of the unusual way Mahrez's penalty was chalked off.
Schmeichel's comments will likely fall on deaf ears, as referees and officials rarely comment after matches, but he can rest assured that plenty of people are on his side - Man City's rivals chief among them.
Leicester were not happy though and remonstrations that the shot had got a touch off of Raheem Sterling when in an offside position fell on deaf ears.
'It's very hard to work out whether Kasper Schmeicel is affected by the position that Raheem Sterling is taking up, ' said the former Republic of Ireland striker.
"Once he makes the play of the ball, he becomes active", he said.
The other players set to leave City this summer include Jesus Navas, Willy Caballero, Gael Clichy, Bacary Sagna and Yaya Toure, who are all out of contract.
In the first half we were good and it was a shame to concede an unbelievable goal.
"Of course it was important but I am pretty sure at 2-2 we would have made a decision to attack more than we thought in the second half", said the Spaniard. City got some luck: An equalising penalty from Riyad Mahrez was ruled out when eagle-eyed referee Bobby Madley spotted the Algerian midfielder touch the ball twice.
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