PSG's attacking trio were influential again during a comfortable away victory, which could've been completely different had their hosts been more clinical with their chances on-goal.
Here are the player ratings from Wednesday's Group B fixture. All statistics courtesy of WhoScored.
Matz Sels: 5/10
Only made two saves and should've done better for a few of the goals. Mbappé's finish was tucked neatly through his legs but he could've been quicker to react and block as it was at his near post. Did well to stop the French teenager from doubling their advantage after a team-mate's defensive mistake, but should've anticipated Neymar's free-kick in time to intervene.
Dennis Appiah: 6.5/10
Provided width down the left-hand side and proved a handful for Layvin Kurzawa to deal with. Created three key passes, made three clearances and two successful tackles. However, needlessly committed a foul to halt Neymar on the edge of the area, from which the Brazilian made it 3-0 and essentially put the result beyond doubt.
Leander Dendoncker: 5/10
His talents are clearly wasted in the centre of defence. The powerful defensive-minded midfielder was tidy with his passing as usual (93.4% pass accuracy) and made two tackles, but committed too many fouls - which PSG utilised to their advantage, continually advancing forward with pace and purpose.
Kara Mbodji: 6.5/10
A typical no-nonsense performance from Mbodji, who made a handful of important defensive interventions. If not for the Senegal international's presence at the back the scoreline could've been much worse for the Belgians.
Olivier Deschacht: 5/10
Regularly beaten too easily down the right. Seemed one or two steps behind PSG's attacking moves, which saw him either out of position or ill-equipped to deal with players running at him with speed.
Adrien Trebel: 7/10
Anderlecht's best player on a forgettable evening. Tenacious defensively, he also posed a threat going forward and created a few half-chances on his own - with more composure and better execution, he could've helped stir an unlikely revival. Five tackles, three interceptions, two completed dribbles and two key passes as Adrien completed the full 90.
Sven Kums: 6/10
Was fairly solid in midfield before being hauled off after struggling with what looked like a hamstring injury. Came close to scoring with a strike from range in the first-half, while completing 90% of his attempted 50 passes.
Pieter Gerkens: 5.5/10
Says plenty about the game that for a forward, his defensive contribution was more significant than his attack-minded ventures into the PSG area. Four tackles, an interception and a shot off-target: Gerkens will be hoping for better displays in future. He'll look to be both sharper and more accurate in possession, as he lost the ball three times through poor control and only Sels had worse pass accuracy than his 75.9% across all starting players.
Henry Onyekuru: 6.5/10
Definitely an experience that he'll remember in future as the talented Nigerian continues to improve. Got the better of Alves on a few occasions down the flank, with his pace and trickery evident to see - but couldn't conjure up the clinical edge to complement his abilities. Was booked for a cynical move to stop play and give team-mates brief respite, while his influence weaned as PSG's dominance showed after the break. Hit the crossbar too but really should've scored.
Sofiane Hanni: 6.5/10
You couldn't help but feel sorry for the Algerian at times. He regularly created space for himself but was not spotted by team-mates quickly enough during moments where Anderlecht themselves looked threatening. Wasn't afforded the freedom to create chances of note in the final third either, instead focusing on defending out of possession for sustained periods.
Lukasz Teodorczyk: 6/10
Did the best he could with limited service. Battled hard - especially in the air - and was harshly booked for an accidental collision with Marquinhos in the second-half. Was regularly isolated alone up-top but still helped to pose a few pressing questions of PSG's backline without key figure Thiago Silva.
A Champions League debut to forget for the Portuguese defender, who was called upon to replace Kums, who hobbled off. It was his weak sliding challenge which set substitute Angel di María through one-on-one with a golden opportunity to finish and add PSG's fourth.
Massimo Bruno: 6/10
Effortlessly weaved past two PSG players on the edge of the box to strike goalwards, but watched on as his swerving effort flashed past the far post. Didn't have much time to do anything more though.
Ivan Obradovic: N/A
Didn't have enough time to earn a fair rating. Came on (88') just before full-time.