#3 Lenglet-Pique stand firm in different ways
While Lenglet is deserving of praise after another impressive display, capped with a first-half goal, his centre-back partner Gerard Pique was also quietly dependable for Barcelona here and needed to be against a persistent Napoli display.
Pique made a game-high seven clearances, four interceptions, two blocks and a tackle to boot with 92.2% pass success (59 completed) over the 90 minutes.
He completed a number of important interventions when under threat from the Insigne-Mertens-Callejon attacking trident, especially just before half-time and on an instance where Insigne skipped past Lenglet... he was again there to save face.
Although his long-range distribution was iffy, one couldn't critique his ability to sense danger and regularly snuff it out with the sort of defiant defending he'll definitely need against Bayern next week.
The same could be said for Lenglet, who besides his well-executed header, was still a heavy defensive presence too. He blocked four shots, three clearances, two interceptions, one tackle and better distribution than Pique (69 passes, 94.5%).
This was an impressive display by both - despite Barcelona collectively gifting Napoli far too many opportunities to get themselves back on level terms.
#2 Messi, who else? The Argentine was pivotal against Ospina and Napoli
He's only played them on three occasions in his career - twice this season - but Napoli goalkeeper David Ospina must be tired of facing Barcelona by now.
Why? Lionel Messi, of course. After watching the Argentine dismantle his Arsenal teammates in north London, the Colombia international remains winless against Barca and his South American adversary has plenty to do with that record.
Messi was once again unsurprisingly influential on this occasion. He jinked past two players in a tight space, got dispossessed but somehow managed to recover quickly before curling an effort between two Napoli defenders.
Ospina could only get fingertips to the strike as it arrowed into the bottom corner and well, it remains remarkable the Barcelona captain can continue to make the most difficult finishes look so simplistic at times.
His deft chip at Ospina's far post was cruelly ruled out with a dubious-looking handball call, and on another evening, he'd have earned a first-half hat-trick. Instead, he licked his wounds and wisely left penalty duties to his close friend after suffering a heavy whack via Kalidou Koulibaly - punished for dithering in possession, as Suarez made no mistake converting from the spot.
I'm sure you don't need to be told how important he'll be next Friday, then. Speaking of...
#1 Barcelona-Bayern in a one-off quarter-final? High stakes
It's fair to say that Barcelona have been underwhelming this season.
Given their lofty ambitions and last year's relative success by comparison, 2019-20 has been a forgettable campaign for a side failing to maximise Messi's abilities to his full potential.
He turned 33 in late June, remains unquestionably their best and most influential player, yet has reached the latter stages of his illustrious career. Injuries are becoming a more recurring theme and their over-reliance on him is worrying.
In stark contrast, Robert Lewandowski is in the peak of his life. He turns 32 later this month, yet the Poland international has never been better or more clinical - a scary thought considering what he's achieved over the last decade.
He scored two and created both assists as Bayern cruised to a 4-1 victory (7-1 aggregate) against a depleted Chelsea side simultaneously on Saturday.
Barcelona-Bayern is scheduled for next Friday from Lisbon, in a one-off quarter-final clash that neither side want to lose. Barca are underdogs though, and rightly so.
Bayern have been ruthless in recent months, and remain unbeaten in the Champions League this term with eight successive wins - and a delayed summer schedule presents their best opportunity to win the trophy for the first time since 2012-13.
It's taken a lot of hard work, patience, personnel changes and frustration to reach this stage but the stage is set. Barcelona need to ruin the party, something Messi has proven capable of doing all by himself at times. If they lose next week, it'll be their first trophyless season since 2007-08.
De Jong is back fit, Antoine Griezmann and Nelson Semedo avoided suspensions during this second-leg and although Bayern will relish exploiting Barcelona's weaknesses, anything can happen over 90 minutes. Who will emerge victorious?