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.
|Seeded Sousa succumbs in Shenzhen|
|US Justice Department charges college basketball assistants in bribery scheme|
|Muguruza charges into Wuhan last 16|
|Mkhitaryan vows to bring consistency to Manchester United|
|Lacazette ´more like Wright than Henry´ - Winterburn|
|Verratti hails ascent of PSG to Bayern´s level|
|Former Newcastle chairman Shepherd dies age 75|
|Mourinho: Lindelof will improve step by step|
|Kimmich eager to tackle Neymar challenge|
|Stokes arrest a distraction for England - Morgan|
|Emery hints at PSG penalty rotation|
|´Not many solutions´ for Man Utd after Fellaini injury, says Mourinho|
|England all-rounder Ben Stokes arrested in Bristol|
|Neymar set to return for PSG in Champions League clash against Bayern Munich|
|PSG´s home hope against Bayern as Griezmann carries Atletico - Champions League in Opta numbers|
|Defending champion Pliskova battles through in Tashkent|
|Fabregas never thought about Chelsea exit|
|Gasly replaces Kvyat as Toro Rosso prepare for 2018 F1 season|
|Starke selection not a threat to Ulreich, claims Salihamidzic|
|Wallabies lock Coleman weighing up next move|
|Manchester City look unstoppable under Guardiola - Walker|
|Hitzfeld urges Bayern to stick with Ancelotti|
|Australia call up Tye for India T20 series|
|Las Palmas coach Manolo Marquez resigns after six LaLiga matches|
|Whiteley boost for Springboks|
|Fabregas: No pure striker better than Costa|
|Ancelotti will be measured on Champions League results, Ballack claims|
|Cowboys coach Green dismissed tiredness talk as ´a load of c**p´|
|Wenger bemoans ´cruel´ Arsenal schedule|
|Tianjin derby under investigation for possible match-fixing|
|Sharks dismiss Hayne speculation|
|Cubs clinch tie for NL Central title, deal blow to Cardinals´ play-off hopes|
|He said what?! The best NFL quotes from week three|
|Prescott ignites stagnant Cowboys offense in win over Cardinals|
|WATCH: Cubs´ Russell brings Cardinals fan fresh nachos after spilling into stands|
|Alonso announces move into management|
|Klopp considers starting ´artists´ against Spartak|
|Lacazette not just a goalscorer – Wenger|
|Jerry Jones, entire Cowboys team kneel before national anthem|
|Aguero only world-class Premier League striker – Henry|
|Steelers´ Villanueva ´embarrassed´ he stood alone for national anthem|
|Kane: I use Ronaldo and Messi as motivation|
|LeBron on protests: My voice is more important than my knee|
|Sproles sidelined with torn ACL, broken arm|
|Rodriguez penalty call correct for Wenger|
|Roethlisberger regrets Steelers´ decision to miss national anthem|
|Pulis rounds on ´cheating´ Sanchez amid Rodriguez penalty row|
|Ramsey: Arsenal must make Emirates a fortress|
|Arsenal 2 West Brom 0: Lacazette double enough for Gunners as Barry breaks Premier League record|
|Yankees´ Aaron Judge breaks Mark McGwire’s rookie HR record|
|Dunbar a doubt for Scotland internationals after surgery|
|Benjamin MRI reveals no structural damage to knee|
|No Real Madrid doubts over Cristiano Ronaldo, insists Carvajal|
|England Ashes hopeful Westley escapes with bruised thumb|
|Nineteen years and counting – Barry´s record-breaking Premier League career in Opta numbers|
|Barry to break Giggs´ Premier League appearance record|
|US Open finalists Stephens and Keys suffer first-round Wuhan defeats|
|Zidane has faith in Real Madrid style|
|Suso pens AC Milan extension until 2022|
|Cavaliers hopeful of January return for Thomas|
|Real Madrid injuries will make no difference, says Bosz|
|A waste of time - Klopp baffled by media questions ahead of Champions League tie|
|Knicks make Anthony trade to Thunder official|
|Football Association backs Glenn over Sampson sacking|
|Juventus to appeal against fine, Agnelli ban issued by FIGC|
|Aguero and Jesus partnership delights Guardiola|
|Athletics´ Maxwell will continue kneeling despite threats & racial slurs|
|Deulofeu, Semedo return for Barcelona but Alcacer dropped for Sporting CP clash|
|Tom Brady disagrees with Donald Trump´s anthem comments|
|Guardiola uneasy over lofty Manchester City comparisons|