The former Barcelona and Bayern Munich manager arrived at City in 2016, tasked with moving the club - which had won two Premier League titles in the previous four seasons - to the "whole new level" demanded by its Abu Dhabi owners.
After City's shock exit to League One Wigan Athletic in last season's FA Cup, Guardiola's side were facing another humbling at lower league opponents after Matt Grimes penalty and a brilliant strike from ex-Academy player Bersant Celina. However, despite this uncertainty, there is hope that the Belgian will be back in time to play a part in the club's Champions League quarter final on April 9th or 10th.
Matt Ritchie celebrates his late equaliser for Newcastle
VAR cameras are installed at all Premier League grounds, so the facilities are used by the FA during their Cup games.
In reality, the Citizens more than deserved the win.More news: Hamilton tops timesheets in first free practice for Aussie GP
Pep Guardiola's men looked to be heading out of the competition at the hands of second-tier opposition, but three goals in the final 21 minutes saw City come back from the brink, as Aguero - who appeared to be offside - nodded in the late clincher.
"People say we are going to win three or four titles and the day we drop one competition they say it's a big failure for Manchester City", the former Spain worldwide told BBC Sport.More news: Dee Ford: How new 49ers EDGE will impact defense
City found themselves 2-0 down after 29 minutes, as Swansea's excellent first-half performance put them on course for a famous upset. "So, I'm sure he's doing everything he can (so) that when he comes back he's going to show his best side", he said.
Speaking on Match of the Day, former England captain Alan Shearer said: "It is very wrong and very unfair".More news: Senate votes to rebuke president's emergency declaration