Guardiola was trolled online for his team selection with fans online slamming his decision to start without Rodri or Fernandinho.
And they continued to poke fun at him for his actions during the Champions League final ceremony.
The Spaniard led his players to collect their runners-up medal from UEFA president Aleksander Ceferin.
Once Ceferin draped the medal around his neck, Guardiola took supporters by surprise when he kissed it.
No way Pep Fraudiola kissed the second place medal :sob::sob::sob::sob::sob: pic.twitter.com/TOTnzDfidb- Tak (@UTDTak) May 29, 2021
Pep kissing his losers medal while Ole keeps it off his neck pic.twitter.com/ujKwX6TY5c- Jordan (@J18i_) May 29, 2021
Pep kissing his losers medal with a smile on his face? pic.twitter.com/mEIuhxnPBE- Spieth Regen (@mikerexum) May 29, 2021
Pep Guardiola kissed the Champions League losers medal. :joy::joy::joy:- :star::red_circle: (@AzeezThings) May 29, 2021
Pep really kissed the loser's medal. Could you imagine if Ole had done that?- Dara (@utd_dara) May 29, 2021
Pep kissed the second place medal and kept it on:joy::joy::joy:- Mott (@UtdEnthusiast_) May 29, 2021
Pep kissing a losers medal. Tell me again how he's the best manager ever.- Me (@TeamXtremeXXV) May 29, 2021
Guardiola sprung a surprise with his starting XI which ultimately backfired as Thomas Tuchel once again got the better of him this season.
And speaking after the match, he explained his decision to leave out the pair of defensive midfielders.
"I decided the decision, to have quality players," he said. "Gundogan played many years in this position.
"To have speed, to find the small players, the quality, the brilliant players, inside, in the middle and between the lines. This was the decision."