#3 Impressive Sergio Oliveira helps Porto put Juventus to the sword
Sergio Oliveira came to the fore against Juventus and his brace in Turin proved to be the catalyst to fire Porto to glory.
The first of his goals came from the spot when he sent Wojciech Szczęsny the wrong way 20 minutes into the first half. The 28-year-old needed to show his physicality soon after that, with Porto having been put on the backfoot as Juventus mounted the pressure.
However, the Portugal international midfielder is an exceedingly gifted and technical player and his abilities were once again on display in extra-time.
With Porto having won a free-kick after Oliveira himself was fouled by Weston McKennie, he dusted himself up to take the ensuing set-piece and showed great ingenuity to find the back of the net from 22 yards out.
The Juventus wall expectedly jumped up to provide extra height but Oliveira slotted the ball beneath them and beyond the despairing dive of Szczęsny.
Ultimately, Oliveira's goals proved to be the difference between qualification and elimination for Porto and the Dragons would be pleased that their number 27 was able to step up and be counted when it mattered most.
#2 By contrast, Federico Chiesa's heroics count for nothing
Like Sergio Oliveira, Federico Chiesa also scored a brace but unlike the Porto man, the Italy international's efforts proved to be in vain.
Chiesa has been in fine form in recent weeks and had provided two assists and scored one goal in his last three Serie A matches, while also scoring the crucial away goal in Portugal that gave Juventus hope in this tie.
The former Fiorentina man had been one of the brightest sparks for Juventus in the first half and deservedly got on the scoresheet at the start of the second 45 minutes.
His goals in regular time saw Juventus come back from a goal down to force extra-time, while he also hit the post in what was an all-round brilliant performance.
In total, the Italy international had four shots, with three of them hitting the target, but it all proved to be a futile effort as Juventus still got eliminated on home soil.
#1 What next for the Cristiano Ronaldo Project at Juventus?
Juventus are one of Europe's great football clubs but the Old Lady of Turin are without Champions League glory since 1997.
This is an extremely long wait for footballing royalty like the Bianconeri and despite having a near total dominance of Serie A, their domestic achievements have a major asterik by virtue of their failings on the continent.
It was for this reason that they sanctioned the purchase of Cristiano Ronaldo from Real Madrid for a club-record fee despite his advancing age.
The Portuguese had shown a penchant for performing on the biggest stages and this came to the fore in his debut season in Turin when he almost single-handedly eliminated Atletico Madrid.
However, things have gone downhill since then and despite consecutive Serie A triumphs, Juventus are yet to make a genuine challenge for the Champions League three years after Ronaldo's arrival.
In the two previous seasons, a case could be made that the Portugal international played his role but was let down by underperforming teammates. However, it was a different scenario in both legs against Porto this season.
Having drawn a blank in his country, the former Manchester United man was once again anonymous in the return leg, although he did show his ingenuity to set Chiesa up for the equalizing goal.
Beyond his assist, it was a sub-par performance from Ronaldo, especially considering what was at stake for Juventus.
His manager had opined that his exclusion from the game against Lazio on Saturday was because he had some fitness concerns, although he went to great lengths to explain that his talisman was in prime condition for the visit of Porto.
But that proved to not be the case and the Juventus number 7 failed to make a genuine mark on the tie which went against his antecedents in previous seasons.
Considering that Ronaldo turned 36 in February, it is safe to suggest that his best years are now very much behind him. He continues to set the pace in Serie A but this is a moot point when you consider that Juventus had won the Scudetto for seven consecutive seasons before his arrival.
It was for his UEFA Champions League prowess that he was signed and the club are yet to make it to the semi-finals three years after his arrival.
With Cristiano Ronaldo's contract set to enter its final year at the start of next season, Juventus will find themselves at a crossroads over the next step to take, especially considering that the major objective for signing the five-time Ballon d'Or winner has not been achieved.