The Sky Blues have finished top of Group C after Tuesday's draw with Porto.
"Congratulations to my team for this game and finishing first," Guardiola said. "We played to win, we didn't concede a shot on target or a corner all game. Alongside Benfica, Porto are one of the best teams in Portugal, very physical. We did really well but unfortunately couldn't score, all the players were fantastic.
"We struggled to score today but we played really well with incredible personality and many things about the game were brilliant."