Celtic boss Brendan Rodgers insists he will have no hesitation throwing Kolo Toure back into the spotlight after his Champions League nightmare.
"I'm not going to change. [If] it's not going well in the future, next season isn't going well in that way, I will go home," Guardiola said.
Guardiola was criticised for omitting Sergio Aguero from the starting XI, while his tactics were also said to have left City vulnerable at the back.
Pep Guardiola is in the not-so-subtle process of ripping out City's trophy-winning spine, but there is a sense of deja vu around the club.
UEFA president Aleksander Ceferin said on Thursday that future UEFA Champions League games may be held outside of Europe.
Juventus full-back Patrice Evra has congratulated Barcelona striker Luis Suarez on his European Golden Shoe award.