Thiago Motta's second-half brace helped Paris Saint-Germain to an impressive 4-1 win away to Olympiacos at the Karaiskakis Stadium.
Vladimir Weiss cancelled out Edinson Cavani's opener with a fine individual effort in the first half, before Motta headed home from two Ezequiel Lavezzi corners to put the visitors in control.
Young debutant Marquinhos added a fourth in the remaining few minutes, in what was eventually a convincing win for Laurent Blanc's side in their UEFA Champions League opener.
Olympiacos made three changes from the side that beat Xanthi at the weekend, with Javier Saviola, Kostas Manolas and Leandro Salino making way for Giannis Maniatis, Alejandro Dominguez and Dimitrios Siovas.
The Ligue 1 outfit handed a debut to 19-year-old Marquinhos, who was drafted in for the injured Alex.
Javier Pastore was ruled out with a foot injury, while Cavani was welcomed back to the starting line-up having been named on the bench for the weekend win over Bordeaux.
Like PSG, Olympiacos recruited a number of players during the transfer window, including former Rangers playmaker Weiss, who very nearly gave his team the perfect start after he sent a stinging long-range effort crashing off the bar within the first minute.
It was a sign of things to come from the Slovakian, who was given another chance 10 minutes later, rifling a low shot just past Salvatore Sirigu's near post.
The Turkish goalkeeper's woodwork was struck again a few minutes later thanks to David Fuster's looping volley as the home side continued to search for an opener.
They were made to pay for their wastefulness three minutes later, however, when Zlatan Ibrahimovic threaded a perfectly weighted ball into the path of Maxwell, who squared for Cavani to tap into an empty net.
But the goal failed to discourage Michel's side and they were duly rewarded for their persistence just six minutes later thanks to a fine individual effort from Weiss.
The winger picked up the ball on the right before cutting inside to shake off first Marquinhos and then Thiago Silva, before sending a flicked shot into the bottom corner of the net.
It was no less than they deserved as PSG struggled to maintain possession for large periods of the first half.
The visitors looked more settled after the break, but struggled to carve out an opportunity until the hour mark when Cavani forced a smart save from Roberto.
PSG gradually began to press, and took the lead for the second time after 68 minutes when Motta beat his marker to power home a header from Lavezzi's corner.
Olympiacos did not appear to learn their lesson and that move was recreated three minutes later, with Motta beating the challenge of Andreas Samaris to once again head home.
Michel threw on Javier Saviola in an attempt to regain a grip on the game, but the experienced striker could not stop his conceding again five minutes from time.
The home side once again failed to deal with a teasing cross into the box, leaving Marquinhos to direct a header past Roberto.
for A. Domínguez 60'
for David Fuster 74'
for V. Weiss 84'
|Mascherano back in Barcelona squad|
|Costa ruled out of Hertha clash|
|´He´s a nice guy´ - Klopp reveals Rodgers meeting|
|Mexes frustrated by Milan´s slump|
|Villa not relegation certainties, says Garde|
|Ryan and Valencia desperate to end dismal Sevilla record|
|Pochettino talks up positive Mourinho relationship|
|Seedorf: Premier League job would be an honour|
|Carragher: Grealish running out of chances|
|Mourinho: Book sales the reason behind Drogba criticism|
|Allardyce: Sunderland looking to emulate Juventus|
|Barkley eyeing Everton silverware|
|Ramsey to continue in unfavoured wide role|
|Stoke boss Hughes wants Arnautovic stay|
|Tottenham no longer fear Chelsea, says Dier|
|Rooney deserves his starting place - Van Gaal|
|Klopp: Lewandowski, Aubameyang show Benteke can flourish with patience|
|Costa must read the game better - Mourinho|
|Ibrahimovic could return to Milan - Raiola|
|Pellegrini unconcerned by Guardiola rumours|
|Hull City 0 Derby County 2: Clement´s side move to Championship summit|
|St Johnstone 1 Dundee 1: Wotherspoon leveller ensures spoils are shared|
|Darmstadt 0 Cologne 0: Schuster held by old club|
|Levante 0 Real Betis 1: Castro sends Mel´s side into top half|
|Lyon 2 Montpellier 4: Courbis´ side expose dire defending|
|In-form Barkley ´good enough for Chelsea or Manchester United´|
|Koke: Difficult for Atletico to catch Barcelona|
|Lucas: PSG sent security guards to players´ homes|
|Palermo v Juventus: Lichtsteiner ready for crucial period|
|Pastore ruled out of Troyes clash|
|Bayern announce record financial results|
|Liverpool v Swansea City: Klopp stays grounded despite strong form|
|CAS reduces RFEF fine but supports FIFA findings|
|Tottenham v Chelsea: Mourinho has faith in porous defence|
|Borussia Dortmund v Stuttgart: Kramny tenure begins at Signal Iduna Park|
|Former FIFA president Joao Havelange hospitalised|
|Teixeira reveals offers from Chelsea, Juventus and PSG|
|Klopp warns Liverpool about Swansea´s attack|
|Eibar v Real Madrid: Casemiro eager to put Clasico in the past|
|Luis Fabiano announces Sao Paulo exit|
|Monk: I have the full support of Swansea chairman Jenkins|
|Newcastle hit by Haidara injury blow|
|Afraid of Higuain? I beat Messi! - Felipe Melo|
|West Ham v West Brom: Song urges Hammers to hit the right notes|
|Coloccini to keep Newcastle captaincy after ´feisty´ week|
|FFF files civil action over Valbuena, Benzema sex tape|
|Sakho expects Liverpool return in six weeks|
|AC Milan are not in crisis, but we need to beat them - Montella|
|Blanc defends Cavani but still wants more goals|
|Bayern in great shape ahead of Hertha test, says Boateng|
|Madrid confirm Varane thigh injury|
|Luis Enrique warns Barceona rivals: Messi only just getting started|
|Mourinho unconvinced by Spurs ´fatigue´|
|Sturridge setback ´not that serious´ - Klopp|
|City boss Pellegrini cool on Guardiola, Messi rumours|
|Mihajlovic sets Milan two-points-per-game target|
|Atletico want to be annoying - Simeone|
|Luis Enrique wants new Barcelona signings in January|
|Barcelona great hails Messi, Suarez, Neymar|
|Mourinho plays down Vardy, Kane rumours|
|Hart ruled out for 10 days with hamstring injury|
|Valbuena ´more than disappointed´ with Benzema in sex-tape case|
|Norwich City v Arsenal: Wenger demands response after West Brom setback|
|Bilic urges reaction from ´angry´ West Ham|
|Sergi Roberto set to miss Barcelona´s Sociedad clash|
|Mason urges Kane to stay at Tottenham|
|Van Gaal: Nasty Vardy reminds me of Bergkamp|
|Hughes warns in-form Stoke are yet to click|
|Van Gaal ´not worried´ by Manchester United form|
|Jovetic credits hunger for Inter´s surprise Serie A lead|
|Bravo won´t leave Barcelona - Braida|
|Costa can match Messi and Ronaldo says ex-Gremio president|
|Caballero eyes redemption as City wait on Hart|
|Ryan: Valencia can challenge for trophies this season|
|Ranieri backs Martial to find form|
|Mane not leaving Southampton - Koeman|
|Valencia goalkeeper Ryan thankful to former coach Arnold|
|Wenger lauds remarkable ´lion´ Sanchez|
|Top spot not crucial for Klopp|
|Hamsik surprised by Napoli´s season|
|Allardyce open to Defoe sale|
|Breitenreiter pleased with Schalke character|
|Griffiths: Blame me for Celtic´s Europa League exit|
|Pochettino happy with Chelsea links to Kane|
|Europa League Review: Liverpool advance, Celtic crash out|
|We´re too easy to play against, laments Villa captain Richards|
|AC Milan v Sampdoria: Mihajlovic the focus ahead of San Siro clash|
|Ferdinand: Ferguson only wanted players with animal instinct at United|
|Klopp frustrated by Mignolet decision|
|Pochettino hails ´mature´ Spurs display|
|Celtic 1 Ajax 2: Late winner keeps De Boer´s men alive|
|Pioli eyes improvement after Lazio qualify for last 32|
|Liverpool 2 Bordeaux 1: Milner and Benteke ensure Europa League progression|
|Dortmund dominant in Krasnodar defeat, claims Tuchel|
|Atletico Madrid v Espanyol: Lopez looking for perfection on the road|
|CBF chief Marco Polo del Nero steps down from FIFA role|
|Qarabag 0 Tottenham 1: Kane header seals Europa League progression|
|Sturridge set for scan on foot injury|
|Barcelona v Real Sociedad: Rakitic puts winning run down to team spirit|
|Paris Saint-Germain v Troyes: Top against bottom in Ligue 1|
|United striker Wilson joins Brighton on loan|
|Mihajlovic abandoned me but Montella is the best, says Ferrero|
|Bayern Munich v Hertha Berlin: Dardai out to stop Guardiola´s juggernaut|
|FC Krasnodar 1 Borussia Dortmund 0: Russians progress thanks to early penalty|
|Rode not planning Bayern exit|
|Koeman hopes ´dangerous´ Long can fill Pelle void|
|Aston Villa v Watford: Garde calls for support to end barren run|
|Crystal Palace v Newcastle United: Pardew dreaming of European football|
|Manchester City v Southampton: Koeman feels Pellegrini´s men can cope with criticism|
|La Liga president Tebas: Clasico was hard to watch|
|Sunderland v Stoke City: Allardyce calls for ´fight and grit´ after Palace success|
|Figures reveal further drop in football banning orders|
|AFC Bournemouth v Everton: Martinez cautions against complacency|
|Hughes urges Shawcross to forget England hopes|
|Leicester City v Manchester United: Top-of-the-table clash intrigues Ranieri|
|Rodriguez out for up to eight weeks|
|Ranieri: It will be hard to break down United´s defence|
|Allardyce hopeful on Defoe fitness|
|Ribery eyes Bayern return|
|Hamann tips Firmino to become a Liverpool star|
|Baines closing in on comeback - Martinez|
|Away fans in France banned from matches until mid-December|
|Azpilicueta: Chelsea on right track again|
|Rummenigge confident Bayern will not lose any key players|
|Deulofeu showing world-class talent, says Martinez|
|Sydney FC 0 Wellington Phoenix 0: Bore draw as hosts miss chance to go top|
|´Not of the professional standard´ - Garde drops Grealish|
|Real Madrid lead the way in World XI nominees|
|Ozil was a bargain at £40m - Wenger|
|FIFA donates returned CBF watches to charity|
|Sanchez could play against Norwich despite hamstring problem|
|Mourinho hopes to see Arsenal suffer Champions League elimination|
|Isco urges Madrid to learn from mistakes|
|Drogba claims Chelsea are lacking leaders|
|Juventus can hold their own against anyone - Buffon|
|Alleged match-fixer released from Singaporean jail|
|Le Tissier backs Ronaldo to play on like Giggs|
|Keane: Rooney looks awful and must do more|
|Rummenigge: Bayern relaxed over Guardiola future|
|Premier League Truce Tournament cancelled over Belgium safety concerns|
|Blanc: Ibrahimovic´s Malmo return was a distraction|
|Astana coach Stoilov delighted with Benfica draw|
|Shakhtar have ´mentality problems´ - bemoans coach Lucescu|
|Lovren vows to become Liverpool leader|
|Mason wants to cement England spot|
|Van Nistelrooy misses rivalry with ´obsessed´ Arsenal|
|Emery disappointed by Champions League campaign|
|Schubert eyeing Europa League spot|
|Cocu revels in PSV´s position after Old Trafford draw|
|Pellegrini questions Mandzukic winner|
|I lived a dream – Ibrahimovic|
|Allegri delighted after Juve seal progression|