Manchester City's disappointing 4-0 defeat from Barcelona were a disappointing one indeed, but Pep Guardiola's men must move on and react well after that sort of result according to their second goalie, Willy Caballero.
Manchester City's winning run finally come to an end in their midweek Champions League tie after being held into a thrilling 3-3 draw by Celtic.
Albeit being disappointed with the result, but Guardiola acknowledge that this kind of situation can happen, especially with a team that are still lacking European experience, that's why he hope that this can be served as a lesson for them.
Real Madrid failed to pick up a victory on their Champions League fixture against Borussia Dortmund, making it their third consecutive draw in all competition.
That result was considered a disappointment for their head coach, Zinedine Zidane, but that doesn't lose the tactician's confidence over his team.
Sergio Aguero continue to shine for Manchester City this season and that brought many joy for the Premier League side's boss, Pep Guardiola.
Speaking after his team's 4-0 win over Borussia Moenchengladbach in their Champions League opening group fixture, Guardiola hails the Argentinian international as a special player.
Picking up a dramatic win in their latest Premier League fixture this past weekend, another tough task awaiting for Arsenal on Tuesday as they face up against Paris Saint-Germain.
Not only the quality of opponent they will be facing, the thing that got Gunners' boss, Arsene Wenger worried is the condition of his main defender, Laurent Koscielny.
It's not a secret anymore that Yaya Toure's future with Manchester City is looking really bleak under Pep Guardiola and things doesn't get any better as the midfielder has been left out from City's Champions League squad.
The UEFA Champions League group stage drawing for this new season resulted in some potential interesting match ups, notably Barcelona's battle against Manchester City and Arsenal meeting with Paris Saint-Germain.
A shock result finally occurred in the play off round or UEFA Champions League as Italian side, AS Roma were eliminated by their opponent, FC Porto.
Drawing 1-1 away from home in the first leg, Roma looked confident in grabbing that group stage ticket, but they fell short after finding themselves finishing that match with only 9 men and eventually losing 3-0.
Manchester City looking set to get themselves into Champions League group stage after grabbing a convincing away win over Romanian side, Steaua Bucharest this midweek.
Although it's still the first leg, but winning 5-0 away from home, it seems like City's passage into the next stage is just a matter of formalities.
Just as it was being expected by many, Cristiano Ronaldo and Gareth Bale are among the three players who could be crowned as UEFA Best Player in Europe Award this year.
Those two names were successful with Madrid in Champions League final and also doing extremely well during Euro 2016, notably Ronaldo who lead his national side, Portugal, in winning the tournament.
There was nothing but disappointment felt by Bayern Munich players following their failure to reach Champions League final after being eliminated by Atletico Madrid.
One of the players who can't hide his disappointment was Arturo Vidal, who believes that Atletico didn't deserve to advance into the final stage.
Real Madrid winger, Lucas Vazquez might not be considered by many as someone who will directly replace Cristiano Ronaldo should if the Portuguese was absent.
However, that was what happened this midweek during Madrid's Champions League first leg tie against Man City.
Being considered as one of the best and successful manager in Europe, Pep Guardiola still acknowledge that his time at Bayern Munich will only be considered a complete success with Champions League glory.