Unai Emery feels the referee made the difference in Paris Saint-Germain's 0-0 draw with Montpellier by not awarding what he saw as a "clear" penalty.
Edinson Cavani was sent tumbling inside the box by Pedro Mendes – already on a yellow card – with 10 minutes left but official Clement Turpin signalled for play to continue.
Montpellier defender Mendes did not appear to make contact with the ball and Emery was unsure how the foul was missed.
He told a post-match news conference: "The penalty is very clear. The referee made the difference on it. It was clear on the pitch and on the television pictures, too."
The PSG boss commended Montpellier's defensive efforts as they held firm to end his side's 100 per cent start to the Ligue 1 season.
Neymar was absent due to a reported knee injury and Emery believed the team could have pushed harder for a breakthrough in the absence of the Brazil star.
1 - Paris have only registered 1 shot on target v Montpellier (Mbappé), their lowest tally in a L1 game since August 2016 v Monaco. Mute. pic.twitter.com/edjU0YZ6iM— OptaJean (@OptaJean) September 23, 2017
"The merit belongs to our opponents, who defended well, closing the spaces with great efficiency," said the PSG boss.
"We played the game as we wanted, with a significant amount of possession, but we need to push more to score goals. We had opportunities, but that's not enough to win games.
"The main goal is to win and today it is true that one point is not enough. This game leaves us a lot to analyse to continue our progress."
Despite the disappointment, Emery tried to look for positives in the result.
He added: "It's not a good result but I'm glad the team remained calm about looking for spaces to score – I think it's a sign of progress.
"Analysing afterwards is always easier, but it's true on the pitch we had to attack the space more. When we did that, we had better opportunities."
|Ronaldo gunning for United, Aguero targets double record - Champions League in Opta numbers|
|Ill Vardy couldn´t stomach penalty decision – Puel|
|LeBron´s Lakers lose again, Magic stun Celtics|
|Bartomeu: No Barca return for Neymar, Valverde contracted until 2020|
|Simmons and ´stimulating´ 76ers in NBA Finals mix, says Longley|
|Falcons heap further misery on Giants|
|Vidic hails Ronaldo as ultimate professional ahead of Old Trafford return|
|Warriors´ Cousins nearing NBA return|
|Pogba can´t do the basics – Souness criticises Man United star|
|Messi absence big blow for Barca as Icardi talks up Inter|
|´You can´t cry, that´s true´ – Ronaldo responds to Isco|
|Bartomeu: Barca still competitive without Messi|
|Bills RB McCoy remains in concussion protocol|
|Raiders place Marshawn Lynch on IR|
|Emery calm over title talk after another Arsenal win|
|Green: Warriors have to clean up defensively|
|Mariners say Bolt talks ongoing amid reports contract offer was rejected|
|Proud captain Ozil revels in Arsenal´s ´sexy football´|
|Puel angry over Holding handball|
|Cilic breezes through in Basel, Anderson fights back|
|Ingram: Four-game ban better than we expected|
|Raiders send Cooper to Cowboys for first-round pick|
|Arsenal 3 Leicester City 1: Outstanding Ozil inspires comeback win|
|World Series 2018: Three reasons why the Dodgers will win|
|Yarmolenko out for six months after Achilles surgery|
|World Series 2018: Three reasons why the Red Sox will win|
|Ozil eclipses Klinsmann to become Premier League´s most prolific German|
|Allegri expecting Old Trafford battle against Mourinho´s United|
|Bertens feared she did not belong in Kerber clash|
|Returning Ronaldo expecting ´tough´ game against Manchester United|
|Cristiano Ronaldo confident of clearing his name amid rape allegation|
|Osaka looking to learn from losing start in Singapore|
|Kovac expects tough test against AEK Athens|
|Whyte gives Chisora deadline over rematch|
|Spartak Moscow sack Massimo Carrera|
|Atletico Madrid confirm fresh injury issue for Gimenez|
|Dolberg extends Ajax contract after Real Madrid links|
|Ronaldo an example for Lukaku to follow|
|Bertens battles back to blast past Kerber|
|Ramos apologises for training ground fracas|
|Raikkonen should take heed of Alonso misfortune as F1 career winds down|
|Guardiola wants Manchester City fans to push team to Champions League glory|
|Isco not interested in departed Ronaldo - he didn´t want to be here|
|World Series 2018: Three storylines to watch in Red Sox-Dodgers|
|Neymar focus bad for football - PSG´s Maxwell|
|Marco Ianni charged by FA over Jose Mourinho touchline row|
|Stephens sees off Osaka in see-saw Singapore battle|
|I´m happy at Manchester United - Mourinho dismisses Real Madrid reports|
|Semenya and Asher-Smith head IAAF Female World Athlete of the Year shortlist|
|Mandzukic to miss Manchester United trip|
|I turned down Manchester United to return to Juventus - Bonucci|
|Sanchez out of Manchester United´s clash with Juventus|
|Australia make Short work of run chase in T20 win|
|Brotherly g-love! Tommy Fury follows Tyson into the pros|
|Ozil´s international retirement can help Arsenal - Emery|
|If you sack Lopetegui, you have to sack us all – Isco|
|Lopetegui defiant amid Real Madrid sack reports|
|Sri Lanka spinner Herath to retire after Galle Test|
|Ronaldo returns for Old Trafford welcome amid disquieting noise|
|Garcia claims third Andalucia Valderrama Masters title|
|Ex-England international Waldrom retires|
|´Massive personality´ Hart can lift Burnley, says Kompany|
|Liverpool felt wrath of ´emotional´ Klopp, says Shaqiri|
|Reid: Jenkins capitalised on Kaepernick movement|
|Manchester United v Juventus: Ronaldo out to end dismal scoring record against Mourinho|
|Injured Ribery to miss Bayern´s clash with AEK|
|Wilshere would have stayed at Arsenal under Wenger|
|Mahomes stars again as Chiefs crush Bengals|
|Bolt must accept ´much less´ to join Mariners, says A-League chief|
|Klopp compares Liverpool to dog without favourite toy|