Youri Tielemans opened his Monaco account as last season's semi-finalists held RB Leipzig to a 1-1 draw to deny Ralph Hasenhuttl's side an historic victory on their Champions League bow.
The big-money signing from Anderlecht struck two minutes after Emil Forsberg scored his club's first goal in Europe's elite competition, with their first shot on target.
The 25-year-old timed his run to perfection to latch onto a ball down the left channel, before cutting into the penalty area and lashing the ball emphatically past Diego Benaglio with just over half an hour on the clock in this Group G encounter.
It was pure ecstasy for the newcomers, but their joy turned to sorrow only two minutes later when Monaco levelled, as Tielemans silenced the raucous home crowd when he capitalised on Peter Gulacsi’s fumble to tap in from close range.
Leipzig, founded in 2009, have enjoyed a rapid rise to the top of club football and, on this showing, Hasenhuttl's men proved they have the quality required to compete at this level.
The inexperienced hosts took their time to settle into the game initially and it was the visitors who created the first opportunity after seven minutes when Radamel Falcao's shot was blocked and Adama Diakhaby could not react quick enough to apply the finish.
Timo Werner has been Leipzig's standout player so far this season and he should have done better when Forsberg's corner delivery just evaded him at the back post.
The historic Leipzig goal finally came after 34 minutes, and in spectacular fashion. Forsberg was allowed to charge into the penalty area from the left channel before finishing emphatically past Benaglio.
But Monaco soon levelled as Tielemans silenced the raucous home crowd. Tielemans was at the back post to meet a superb right-wing cross, and though his first effort was blocked he was on hand to apply the finish from the rebound.
Leipzig ended the first half on a high and almost restored their lead when Lukas Klostermann's cross was inch-perfect for Werner, but Kamil Glik stepped in to make a crucial intervention.
The hosts started the second period on the front foot and when Werner - usually so prolific - broke into the box after 52 minutes, he was favourite to score. Agonisingly, he sent the ball inches wide of the post.
And just before the hour mark, Glik saved his goalkeeper's blushes when the Monaco defender cleared from the line after Benaglio had flapped at Forsberg's excellent corner delivery.
Leipzig's pressure was building and after 62 minutes, following a nice team move, Yussuf Poulsen had the ball in the back of the net, only for the goal to be ruled offside.
Benaglio had to be at his best to block Jean-Kevin Augustin's goal-bound effort in the latter stages as Leipzig had to settle for a point.
|No passports required - Burnley´s 51-year wait for European tie sees Clarets draw... Aberdeen|
|Huddersfield bring in Bacuna to boost midfield|
|Forget the GOAT and the goatee - just enjoy Ronaldo and Messi|
|Ronaldo bearing down on Daei after going past Puskas - The top five goalscorers in international foo|
|Portugal 1 Morocco 0: Record-breaker Ronaldo sends Renard´s men out|
|Halep pulls out of Eastbourne International|
|Brazil v Costa Rica: Coutinho ready for more Selecao toil|
|Muller and Bierhoff dismiss reports of German disharmony|
|Mooy can play at a higher level, says Socceroos boss Van Marwijk|
|Remarkable Ronaldo breaks Puskas´ European record|
|Belgian Grand Prix deal agreed until 2021|
|Isco: I´m not going to speak to Ronaldo again!|
|Slater expects to be fit for Origin II|
|Curran and Overton added to England ODI squad|
|Hussey fears Australia will be left with ´mental scars´|
|Fabianski swaps Swansea for West Ham|
|Loftus-Cheek ready to replace Alli|
|England are a team now - Rashford|
|Lazaridis calls for Cahill to start against Denmark|
|Arzani and Ryan can play at the highest level, says Bosnich|
|Dust (Ja)pan and brush: Blue Samurai fans clean up in Saransk|
|Lodge reaches agreement over New York attack|
|Gerrard can become a strong manager - Arena|
|Arsenal target Torreira has left for €30m, says Sampdoria chief|
|Murray unsure over Wimbledon participation|
|De Gea has to bounce back from Ronaldo shocker - Bosnich|
|Martinez not looking for perfection|
|Farah´s Wests Tigers return confirmed|
|Cubs get extra-inning win to split doubleheader with Dodgers|
|Denmark will ´struggle´ if Australia stop Eriksen, says Jakobsen|
|Astros´ win streak ends at 12|
|Lahm backs Germany, Low after losing start|
|Messi has all our support – Dybala|
|Strickland apologises for ´stupid decision´ that led to broken hand|
|Five-time Open Championship winner Thomson dies aged 88|
|´Positive´ Pogba not bitter towards media, says Varane|
|Portugal privileged to have ´humble´ Ronaldo, says Pepe|
|Strickland breaks hand punching door after blown save, out for up to eight weeks|
|He will have received good money – Costa delighted by Griezmann extension|
|Kane: Pochettino sent me love hearts after World Cup heroics|
|Nationals place Adams on 10-day DL with broken finger|
|Dybala: I can play alongside Messi|
|Lewandowski: Poland didn´t take enough risks|
|England´s Kane aiming to reach Ronaldo, Messi levels with World Cup performances|
|Kicker given three-year match-fixing ban|
|England confirm Alli thigh injury|
|Federer through, Zverev out in Halle|
|Back on the map and earning letters from ladies, Tabarez embraces Uruguay´s heritage|
|Rampant England rout Australia in record-breaking display|
|Pulisic in right place at Dortmund, says Arena|
|Wilshere confirms Arsenal exit|
|NASCAR at Sonoma: TV schedule, standings, qualifying drivers for Toyota/Save Mart 350|
|Muguruza and Kvitova cruise through in Birmingham|
|Leno among top 10 most expensive goalkeepers|
|Pained Salah unable to halt Russia´s unlikely march|
|Kyrgios downs ´legend´ Murray as Dimitrov and Djokovic progress|
|Neymar pain normal – Coutinho unconcerned by ankle issue|
|Russia 3 Egypt 1: Salah strikes but hosts right on course for last 16|
|We must make Ronaldo less exceptional, says Morocco boss Renard|
|Chandimal handed one-Test ball tampering ban, faces further ICC charge|
|Arsenal sign goalkeeper Leno from Leverkusen|
|Mexico style in Germany win surprised Arena|
|Monaco complete €20m move for Lyon teenager Geubbels|
|Saudi team don´t know cause of aeroplane fire, Pizzi reveals|
|Champions League qualifying draw: Celtic travel to Armenia, Ajax face Sturm Graz|
|I´ve never seen a player win on his own – Santos shrugs off Ronaldo dependence|
|Murray impresses despite narrow defeat on return|
|West Ham land club-record Diop signing|
|El Hadji Diouf hails ´perfect start´ for Senegal|
|Cisse and Senegal give cause for African celebration|