Sporting Lisbon produced a first-half attacking masterclass to beat Olympiacos 3-2 in their Champions League Group D opener at the Karaiskakis Stadium.
Seydou Doumbia opened the scoring after just 70 seconds, before Gelson Martins took full advantage of some kamikaze defending to double the visitors' lead inside 14 minutes.
After hitting the woodwork twice, Sporting netted a third through Bruno Fernandes' clipped finish over a horribly exposed Stefanos Kapino in the Olympiacos goal.
Olympiacos produced a dramatic late rally, with substitute Felipe Pardo scoring twice, but the damage had been done in a dreadful first-half display.
Besnik Hasi's men must now pick themselves up for what will be a daunting trip to Juventus in two weeks.
Sporting, however, will have a spring in their step ahead of Barcelona's visit to Estadio Jose Alvalade.
The visitors got off to a sensational start with on-loan Roma striker Doumbia opening his account for Sporting.
Ivory Coast international Doumbia was given the freedom of the Olympiacos area to meet Marcos Acuna's teasing free-kick and head past the flailing Kapino.
A shell-shocked defence was breached again a little over ten minutes later.
An Olympiacos attack was swiftly countered by Sporting, with Doumbia releasing Martins just over the halfway line. Martins' pace took him away from the backtracking defenders to coolly slot past Kapino.
Sporting then nearly netted a third in the 21st minute. Fernandes spun elegantly on the edge of the area but his curled effort crashed back off the post.
Martins should have had his second soon after but he somehow thumped his close-range effort against the crossbar when it looked easier to score.
The Portuguese did not have to wait long to make it three, though, as they once again broke through the home defence with alarming ease.
Sebastian Coates' through ball from defence was latched onto by Fernandes, and without a defender in sight, he was able to clip over Kapino to give his side a thoroughly deserved 3-0 lead at the break.
Safe in the knowledge that they were, barring a remarkable turnaround, taking three points back to Portugal, Sporting were nothing like as potent in the second half.
In fact, it was Olympiacos who carved out the first significant chance. Uros Djurdjevic scuffed an effort towards goal, but the impressive Coates was able to divert it behind.
It was a hugely improved second half performance from the hosts, and they got their reward in the 89th minute when Pardo drilled a low shot into the bottom-left corner.
Pardo then scored his second from Diogo Figueiras' cross to set up a tense finale, but it was too little too late for Olympiacos.
|Conte laments Italy World Cup failure|
|Amiens 1 Monaco 1: Jovetic rescues point but champions give PSG boost|
|Stuttgart 2 Borussia Dortmund 1: Bosz pressure builds after more Burki mishaps|
|Sunderland target Coleman steps down as Wales manager|
|Conte´s wife tells him to grow a beard – Conte grows a beard|
|Simeone rules out Everton job, promising ´a couple of years at least´ at Atletico|
|Pique to miss Barcelona´s Leganes trip over personal matter|
|UEFA closes Roma ´monkey chanting´ case|
|Don´t worry about Messi renewal, Valverde tells Barcelona fans|
|´Griezmann? We´ll see´ – Valverde won´t rule out Barcelona pursuit of Atletico star|
|Unsworth surprised to see Allardyce snub Everton|
|Mourinho has ´immense respect´ for Benitez|
|Howe backs Defoe to make World Cup squad|
|Everton speculation out of my control - Silva focusing on Hornets|
|Conte concerned by Manchester City´s breakaway lead|
|Man City results ´perfect´, but Guardiola demands improvement|
|David Luiz back in Chelsea squad, Conte confirms|
|Recovered Klopp offers Liverpool fitness update|
|Guardiola confident Aguero in ´perfect´ condition despite hospital trip|
|Ibrahimovic, Pogba and Rojo back for Manchester United|
|Heynckes compiling list of potential successors|
|Modric & Carvajal fit for Madrid derby|
|Bayern begin talks over Wagner deal|
|Pulis angered as Chadli sidelined for ´foreseeable future´|
|Neymar to join Ronaldo at Real Madrid? Zidane speaks out on PSG star|
|Guardiola & Sane complete Man City award double|
|Brave Chapecoense secure top-flight status|
|Tottenham have overtaken Arsenal as north London´s best - Sherwood|
|Brisbane Roar 3 Melbourne City 1: Papadopoulos at the double as hosts finally win|
|Seaman: Wenger must start Lacazette against Tottenham|
|I am more than just a goal machine - Ronaldo ignores Real Madrid criticism|
|Skriniar not interested in Barcelona speculation|
|France need Benzema, says Aulas|
|Van Dijk could leave Southampton in January|
|Sanchez snubbed Barcelona switch - Osorio|
|Atletico Madrid v Real Madrid: Simeone and Zidane face dangerous, defining Derbi|
|Aubameyang baffled by Dortmund suspension|
|Pochettino lauds Wenger longevity as he eyes 20 years at Spurs|
|Ronaldo: Real Madrid don´t fear PSG|
|Zenit´s Mancini not thinking about Italy job|
|Wenger advises Pochettino to fight the ´fear´ of winning trophies|
|Ronaldo: I want seven Ballons d´Or... and seven children!|
|Howedes ready for long-awaited Juventus debut|
|Bayern´s Wagner interest confirmed by Nagelsmann|
|Dyche ´amazed´ at persistent Everton talk|
|Manchester United post record first-quarter revenues|
|Hodgson confident Benteke will be fit for Everton clash, unsure over Loftus-Cheek|
|Klopp returns to Liverpool training after hospital visit|
|Moreno urges Coutinho to reject Barcelona switch|
|Hamsik refuses to be distracted by Maradona record|
|CAS rejects Adrien Silva´s appeal|
|Aubameyang dropped by Dortmund for ´disciplinary reasons´|
|Aguero declares himself fit to face Leicester City|
|If Griezmann isn´t committed, he should leave – Koke|
|Knee surgery to sideline PSG´s Motta|
|Kane the same as Lewandowski, Eboue proclaims|
|Let Neymar focus on football - Emery|
|Spurs quartet return but Alderweireld set for longer absence|
|Ibrahimovic eyes different role on Manchester United return|
|Transfer target Messi was beyond Manchester City, says Robinho|
|´Ultimate defender´ Zouma one of Premier League´s best, claims Shawcross|
|Cantona baffled by Neymar´s PSG move|
|Loftus-Cheek must return to Chelsea, says Willian|
|Central Coast Mariners 1 Adelaide United 2: Kitto snatches dramatic win|
|Cazorla´s fitness woes the worst injury Wenger has known|
|Wenger trusts Lacazette completely|
|Atletico Madrid v Real Madrid: Demolition derbies, Raul´s revenge and other memorable capital clashe|
|Mourinho: Ibrahimovic will return in 2017|
|Spain and England at risk as World Cup draw pots confirmed|
|Atletico Madrid v Real Madrid: Cristiano Ronaldo, King of El Derbi|
|Gareca: World Cup spot is for the Peruvian people|
|World Cup: The 32 qualified teams|
|Peru 2 New Zealand 0 (2-0 agg): South Americans qualify for World Cup after 36-year wait|
|Ronaldo congratulates Corinthians on seventh Brazilian title|
|Van Dijk focused ahead of Liverpool clash – Pellegrino|
|Ravanelli: I´d bend over backwards to bring back Conte|