Kylian Mbappe celebrates his opener for Monaco.Pep Guardiola failed to go beyond the round of 16 of the Champions League for the first time in his career as Manchester City were eliminated from the competition in the first nockout round of the competition.City won the first leg 5-3, but lost drew the tie 6-6 and lost on the away goals rule, as Monaco won 3-1 on Wednesday night.Kylian Mbappe and Fabinho gave Monaco a 2-0 lead in the first half, before Leroy Sane scored in the second half to give City hope of progress. However, Tiemoue Bakayoko scored later in the second half to seal the win as Monaco progressed at the exense of Manchester City.First HalfLike the first leg, this one began with Monaco on the front foot, and showing serious intent to put their English opponents to the sword, with Mbappe and Bernardo Silva making life difficult for the City defence and midfielders.And it wouldn’t take them long to create their first opportunity of the match, the impressive Mbappe forcing Willy Caballero into a save, as he weaved through several City players and his effort looked to be going in, but the City goalkeeper was on hand to parry the ball which earned Monaco a corner kick.The Principality club would take the lead moments later, and who else, but Mbappe, whose finish from close range beat Caballero this time, and Monaco were up and running. 1-0.The 18-year old Mbappe would put the ball into the back of the net eight minutes later, but his effort was ruled out for offside, as he was marginally behind the City defenders.Pep Guardiola’s side would then go down further, as a neat work down the left flanks left the City defence exposed, and Fabinho was at the right place at the right time to latch onto a fine pass to score the second, a goal that could win the tie for Monaco. 2-0 at half time.Second HalfThis was Manchester City’s turn to take the initiative, and so they did from the start of this second half, as they pressed Monaco and pinned them back, as they went all out for that goal that would bring them back into the game and possibly take them into the quarterfinals.Raheem Sterling had been quite impressive for City, and once again, he found Sergio Aguero after a neat work down the flank, only for the Argentina striker to fail to hit the target, as his effort went way off the goal.Minutes later, Monaco goalkeeper Danijel Subasic was called into action as he came off his line to clear the ball off the path of Aguero, who was put through by Kevin De Bruyne. However, the goal would come in the 71st minute, as Sane was on hand to fire home a rebound after Subasic had saved an earlier effort, and all of City’s hard work had paid off. 2-1 on the night and 6-5 on aggregate, which was good enough to see City through.But six minutes later, Monaco were back finding the back of the net, Bakayoko connecting well with Thomas Lemar’s free kick to head home and equal the score 6-6 on aggregate and 3-1 on the night.But tried as they did, Pep Guardiola was shown the exit from the Champions League in the round of 16 for the first time in his career.