A controversial penalty was awarded to Liverpool in the 51st minute of the game when Man City's Gael Clichy tripped Roberto Firmino in the penalty box.
"Going into the worldwide break it's about momentum", he told Sky Sports.
Asked why his side's performance had filled him with pride, Guardiola said it was because of how they responded to their bitter European exit.
"When you play with [Yaya] Toure, [David] Silva and De Bruyne alongside two 19-year-olds [Leroy Sane and Raheem Sterling] and Aguero upfront - they all want to attack", Guardiola told reporters.
Manchester City and Liverpool are separated by just one point in what might be the most competitive race for top four ever, but one of them can separate from the challenging pack with a victory on Sunday. If you do it, it's a success and if we don't do it, we will be disappointed, but we would not stop working and would not stop believing in this project.
Guardiola said City's enterprising display, so soon after their disappointment at Monaco, made it "one of (his) happiest days as a manager".
Celtic boss Brendan Rodgers backs Stuart Armstrong to shine for Scotland
I have always believed that global football is about technique, speed, mobility and a tactical awareness of the game. The 24-year-old's fine performances this term have seen him recognised by the Scotland global team.
There was an very bad lot of anger, amid some gloriously furious football, and one moment of incredulity as Adam Lallana produced possibly the miss of the season - if not the decade.
As the final global break of 2016/17 is on the horizon, it's time to take one deep breath and look at who, in the top seven clubs in the league, can make a difference that could push their sides higher than where they now are - in what promises to be an intriguing run-in to the end of the season.
"We gave them the opportunity to score and they did it".
"When you approach one game after 10 games winning nothing is special". But he played and he lost, because Monaco showed more consistency and strength.
Third place Manchester City host fourth place Liverpool at the Etihad Stadium this afternoon (4.30pm kick-off) as both sides look to consolidate their places in the Premier League's top four. "They have to sit and analyse why this amount of things happen, not [just] in Manchester City games but in all the games". "But we don't score goals and when that happens, it's so hard".
Neither manager will be happy with the final result, seeing as both sides missed glorious chances to claim a win, with the shared points leaving Jose Mourinho and his players sensing blood - and a top four place come the end of the campaign.