Galtier joined Nice ahead of the 2021-22 campaign after winning the Ligue 1 title with Lille, but he stayed at the Allianz Riviera for just one year before making the move to PSG.
Speaking on RMC show 'After Foot' on Wednesday, ex-Nice director of football Fournier suggested Galtier's exit came down to more than just football reasons.
"It's common knowledge that the relationship I had with Christophe was quite chaotic from the start of the season," said Fournier, who himself left for Parma in July
"Quite honestly, if I explain the real reasons we argued, Christophe would no longer be allowed in a locker room, neither in France nor in Europe.
"But it was not about football matters. These are much more serious things from my point of view. It was indirectly linked to football. These are things that affect me deeply.
"We finished the season and we, him and I, were as professional as possible to limit the negative impact that it could have had on the team. Then there was the separation."
Galtier was asked about those remarks at a pre-match press conference on Thursday ahead of his first meeting with Nice since joining PSG.
"He is pretentious," Galtier told reporters. "I am not surprised at the way he expressed himself. I don't want to get tired of debating on everything that was said.
"If we do that, the way it works means we create one debate after another. I'm not surprised about what I heard knowing the character. That's all I've got to say."
Galtier won 23 of his 43 matches in charge of Nice last season and guided the club to a fifth-place finish in Ligue 1.
He departed with the best points-per-game record of any coach in Nice's Ligue 1 history, with his return of 1.76 marginally better than current incumbent Lucien Favre's 1.67.
Galtier's Nice went unbeaten against PSG last season and were the only side to keep clean sheets in both matches against the Parisians.
However, PSG welcome the Eagles to Parc des Princes on Saturday having won seven of their opening eight matches, scoring 26 goals and conceding only four in the process.
Asked if his side are prepared for the challenge on the back of a two-week international break, Galtier said: "We have to get back to normal as quickly as possible.
"We've worked for the past 10 days with five players. This is the first game in a long series. There are 13 games to go before the World Cup and we are preparing carefully."
PSG ultimately won the tie 3-1 at Stade Gaston Petit thanks to late goals from Carlos Soler and Juan Bernat, but their third-tier opponents had given them a tough battle until then.
With no Lionel Messi, Neymar or Kylian Mbappe, PSG relied on 20-year-old Hugo Ekitike to fire them in front early on, before Natanael Ntolla equalised prior to half-time via a deflection off El Chadaille Bitshiabu.
Late pressure finally bore fruit for Galtier's side, though, as Soler and Bernat both struck, and the PSG head coach was just happy to be through to the last 32.
"There is the satisfaction in being qualified," he said. "Games like this are difficult. The start was in line with what I expected, with the opener. Afterwards, my team was cut in two and that gave Chateauroux a lot of hope.
"Did we think things were going to be easy? Maybe."
The former Lille and Nice boss made seven changes to the team that started the 3-1 loss at Lens last time out, including teenage trio Ismael Gharbi, Bitshiabu and 16-year-old Warren Zaire-Emery.
Although it took the introduction of Sergio Ramos and Fabian Ruiz in place of Bitshiabu and Gharbi just after the hour for the visitors to take charge, Galtier was pleased with the performances of the youngsters, having anticipated a tough night with several first-team players missing following the World Cup.
"I was satisfied with the young players," he said. "They were serious and on pace. I really liked Ismael in the game. Warren was of a good level. El Chadaille was unhappy [about the goal against].
"I expected a complex game with the absence of many players and the different states of form. We will see which ones we will recover for Angers [on Wednesday].
"Teams that have had a lot of players at the World Cup are struggling to restart at the start of the year. We will quickly have to refocus on the objectives."
Mathias last week posted videos online promising to publish "great revelations" about Paul, his agent and France team-mate Mbappe.
In Mathias' Twitter posts, he claimed Paul had sought out a marabout to harm Mbappe with witchcraft.
The lawyers of Juventus midfielder Paul released a statement in response, claiming Mathias' comments had followed "threats and attempts of extortion by an organised gang against Paul Pogba".
Mbappe has not commented on his unknowing part in the affair, although it was reported he had contacted both men.
Regardless, Galtier, his Paris Saint-Germain coach, is not concerned.
"Could there be an impact on his performance, on his mind? I don't think so," Galtier said. "And when I say I don't think so, I don't know, because I have not broached the subject with Kylian.
"I didn't feel the need to; he performs well in matches, he's happy in training, he's fresh."
PSG may have their own issues to deal with after reports suggested there were tensions between Luis Campos and Antero Henrique – the two men tasked with transfers – over the failure to secure permanent exits for a number of unwanted players.
Galtier laughed when he was asked directly about the relationship between Campos and Henrique, but his response did not reference the latter.
"Since I have been here, I have been in permanent contact with the president and Luis Campos," he said.
"All the strategies and plans, we developed them together."
On the state of the squad, Galtier said: "With the president and Luis Campos, we had targeted what we thought should be changed.
"I had been very direct with the players. Many players have left, many on loan, but what is important for me is to work with the group."
In the same news conference, Galtier confirmed Keylor Navas – one of those expected to depart – would now be reintegrated into the squad and "play a few matches, like all number twos".
Galtier was confirmed as PSG's new head coach on Tuesday, with the former Lille and Nice boss replacing Mauricio Pochettino after the Argentine failed to end the club's wait for Champions League success.
Mbappe was crucial to PSG winning a 10th Ligue 1 title last season, registering more goal involvements (60) than any other player in the top five European leagues in all competitions, scoring 39 times and providing 21 assists.
Having been widely expected to join Real Madrid on a free transfer, Mbappe instead elected to sign a new three-year contract with PSG in May, one which some reports claimed could give him power over the club's recruitment policy and coaching appointments.
But Galtier, while delighted to see Mbappe stay, says the forward will simply be one part of his star-studded squad at the Parc des Princes.
"As a French coach, I was happy that Kylian stayed at PSG. It's good for PSG, [and for] our championship. I didn't talk to him, like with any of the players," Galtier said at his unveiling.
"We know what he brings, we will have to not give him all the responsibility and the weight of the results.
"He is a PSG player, and all these great individuals with whom I am going to be working with are at the service of the collective.
"As in all groups there will be some shortcomings, it will happen. No player will be above the team.
"My objective is that this sum of talents becomes a great team with great strength. I am convinced that together we can have the greatest season possible.
"If players come out of this framework, they will be dismissed."
PSG embarked on a substantial recruitment spree last year, signing Lionel Messi, Sergio Ramos, Georginio Wijnaldum, Achraf Hakimi, Gianluigi Donnarumma and Nuno Mendes, but still failed to go beyond the Champions League's round of 16.
The club have been quieter this time around, only adding midfielder Vitinha since appointing Luis Campos as a football advisor last month.
Galtier says he will work collaboratively with Campos – who he partnered at Lille – to shape the Parisians' squad.
"We are in permanent contact with Luis Campos. He knows what I expect from my team," Galtier added.
"Does Luis do the recruitment? Yes, But for three years, we have done transfer windows together, no player comes without my agreement, it is very clear.
"If there is anyone who knows the players, it's him. In the day-to-day management, I want to see the life of the group, the investment of the players.
"Before my intervention, there is a discussion with Luis. I never make a decision without consulting him."
Le Graet is facing calls to quit as FFF president after coming under fire for a bizarre comment about France great Zidane, and allegations about his leadership.
The 81-year-old Le Graet told RMC he did not "give a toss" where the 1998 World Cup winner went in his next coaching job, and added he would not answer the phone to the former midfielder.
Former Real Madrid head coach Zidane had been thought to be a likely contender for the France post if coach Didier Deschamps had decided to leave after the recent World Cup in Qatar.
It was instead announced Deschamps would be staying on until the 2026 World Cup, signing a new contract.
France star forward Mbappe delivered a clear and powerful rebuke to the federation president, writing on Twitter: "Zidane is France, we don't disrespect the legend like that..."
While Galtier did not wish to pile on further criticism of Le Graet, the PSG head coach also made it clear he did not agree with the comments from the veteran federation boss either, and understood why Mbappe took his stance.
"Zinedine Zidane deserves the respect of everybody," Galtier said in a PSG press conference on Tuesday.
"He was an extraordinary player for the France team and a brilliant coach who has won the Champions League three times.
"The words that were said have created a strong reaction. I'm not going to comment on those words. I will simply say Zinedine Zidane deserves huge respect from everyone."
Galtier added: "Kylian Mbappe is a great guy. I haven't spoken to him about this. That is away from the context of PSG.
"He expressed himself in his own way with his heart, so that is what he said, and I am not surprised that Kylian Mbappe wanted to defend Zinedine Zidane. I know he has a huge respect for Zinedine Zidane."
The French sports minister Amelie Oudea-Castera has called for change at the top of the FFF, while leading agent Sonia Souid accused Le Graet of improper conduct.
In an RMC interview, Souid outlined how her belief was that in their dealings from 2013 to 2017, Le Graet saw her as an object of his sexual desire.
Le Graet and the FFF did not immediately respond to Souid's allegations.
Former head coach Galtier steered Lille to a first Ligue 1 title in a decade before departing for Nice, with new boss Gourvennec masterminding a 1-0 win over Paris Saint-Germain in Sunday’s curtain-raiser for the new domestic season.
Xeka's first-half strike from long range was the difference between the teams, ending PSG's eight-year spell of dominance in the competition, while it also secured Lille's first ever triumph at the third attempt.
"When you play a trophy, what matters is the title," Gourvennec told the media after the game. "We suffered in the second half because there was a high technical quality in front of us.
"We went through a lot but the players are used to it. There were also moments like that last season, and we were able to stay strong.
"It is not easy to take over from Christophe [Galtier]. I say it very simply: I share this title with him because he has done a remarkable job with his staff. It's kind of his title.
"It's good to start on a positive note. There is collective strength in this team, and talent too. We found that tonight."
Pochettino's men were dethroned in Ligue 1 last term by Gourvennec's new side, who denied the former Tottenham boss a third domestic trophy at the French giants, with the hard-fought win an early psychological blow ahead of the new campaign.
However, Julian Draxler, who was denied by Lille goalkeeper Leo Jardim in the first half and volleyed wide in the second, insisted the result would not impact PSG's Ligue 1 preparations.
"It's hard to accept losing a final but we didn't play badly when we were missing players," the attacking midfielder said after the final loss. "It wasn't perfect, but in the second half we were the best team.
"Congratulations to Lille. We are sad and disappointed for our supporters, but we gave everything until the last minute. We'll be ready for Ligue 1."
PSG had a number of first-team regulars absent, including Kylian Mbappe and Neymar.
Gianluigi Donnarumma was also not involved, though fellow new recruit Achraf Hakimi started and Georginio Wijnaldum was introduced as a second-half substitute.
That is the verdict of Paris Saint-Germain head coach Christophe Galtier, who steered clear of either recommending the role to Mbappe or putting any pressure on national coach Didier Deschamps.
At the age of 24, Mbappe has already won 66 caps for Les Bleus, scoring 36 goals in the process.
He won the World Cup in 2018 and scored a hat-trick against Argentina in the 2022 final but painfully finished on the losing team.
PSG striker Mbappe appears an obvious candidate, but he may not aspire to the captaincy, which Lloris held for 10 years.
Manchester United defender Raphael Varane is another strong contender for the role, according to reports in France, having served as vice-captain at the World Cup.
Galtier said on Tuesday: "I'm not the national team coach. I'm not going to get involved in the France captain discussion. Sometimes, the France captain is of a certain age with a certain number of caps.
"Kylian Mbappe has got many under his belt and many incredible performances. I haven't spoken to Kylian Mbappe about whether he will be the France captain or not.
"Of course, that is a huge responsibility. It is not me who will decide who the captain will be. Even without the armband, he is a leader."
PSG eased into the last 16 of the competition with an emphatic 7-0 victory at Lens' Stade Bollaert-Delelis, with Mbappe involved in all but one of their goals.
The sixth-tier opposition – who were technically the home team – did not look overawed and played some attractive football during the early stages, but the floodgates opened once Mbappe put PSG ahead with 29 minutes played.
It was 4-0 by half-time, with Mbappe netting three and setting up Neymar – the France forward added another two after the break to become the first player in PSG history to score five times in one match.
Carlos Soler – the scorer of PSG's other goal – also impressed, but it was Mbappe and Neymar whom Galtier focused on.
"Kylian Mbappe's a goalscorer, he's obsessed with goals and attacking," the coach told beIN SPORTS.
"I'm not going to say he's going to gain confidence [from scoring five goals], but he's up to his standard.
"It was important for him and Neymar to play the full game. They combined a lot and looked for each other a lot. It was good for them."
Such a contest represented the risk of a major shock for PSG, but there was never any real danger of a defeat as the Parisians produced a thoroughly professional display.
Mbappe believes that reflected the respect they have for lower-league opposition.
"We're happy, we came to qualify and respect this team," he said.
"Respect means playing at our level. We're happy. It was a great opportunity for [Pays de Cassel], and for us because we also come from amateur football.
"We are very happy to come and play, and it is an important competition for Paris Saint-Germain."
On the other side of things, Pays de Cassel coach Samuel Goethals spoke of his pride despite the heavy defeat, highlighting how playing in front of such a crowd was by no means a regular occurrence.
"It's still a source of great pride," he added. "The game was complicated, we did things within our means. I'm super proud of the group.
"We knew the balance of power was going to be very unbalanced, and it was unprecedented for each of us to play in front of 35,000 people, but I saw a yellow and black stadium, it was magnificent to experience.
"You have to be real, we are in Regional One, the sixth division, we are amateurs, and this was seen on the field. I would have preferred that we conceded one or two goals less, but [the match's speed] was too fast."
France international Mbappe, making his first start of the season, missed a penalty in the 23rd minute, but created the first goal soon after when his low cross was turned into his own net by Falaye Sacko.
Neymar then scored twice – the first from the penalty spot – before Mbappe opened his account for the season with a smart finish at the back post after 69 minutes.
Debutant Renato Sanches added a fifth for the hosts late on, while Wahbi Khazri and Enzo Tchato Mbiayi were on target for Montpellier.
After a 5-0 win over Clermont last weekend, PSG became the first side to score five or more goals in their first two games of a Ligue 1 season since Reims in 1961-62.
Mbappe looked unhappy throughout the game and refused to celebrate his goal, much to the frustration of a number of his team-mates.
He also reacted furiously to Vitinha's decision to pass to Lionel Messi rather than him late in the first half, throwing his arms up in disgust and seemingly refusing to continue with the attack.
Galtier, though, does not believe too much should be read into it and says Mbappe is simply frustrated at being behind his team-mates in the fitness stakes.
"Kylian played his last game three weeks ago so I knew it was going to be tough on a physical level for him," the PSG boss told Canal+.
"He's a competitor. He wants to be good and he wants to be good quickly, but a top footballer is not on and off like that; it takes a little time to regain 100 per cent of his athletic abilities.
"When he's at 100 per cent, he'll make the difference even more. These are players who like to score, who want to score, who attack.
"It's a bit normal for him to be disappointed at being a little short physically compared to his team-mates."
Mbappe's penalty miss was just his second in Ligue 1, with both of them coming at the Parc des Princes.
PSG midfielder Marco Verratti attributed his team-mate's attitude to that miss and says he does not mind him sulking as it shows he cares about the club.
"Kylian is a player who always wants to do well," the Italy international told reporters. "I think that with the missed penalty he was sulking a bit but that's normal. He's a big player, he always wants to make a difference.
"When he misses something, he's disappointed, that's normal. But afterwards he bounced back with the first goal on which he was decisive, then afterwards with his goal.
"It's good when he is angry because it means that he cares a lot about this team, that he wants to do well, that he wants to make a difference."
PSG are next in action a week on Sunday when they visit Lille.
The forward suffered an ankle injury in Brazil's opening World Cup match, missing the final two group-stage games, though he returned to score in both of the Selecao's knockout ties as they crashed out in the quarter-finals to Croatia.
Neymar returned to PSG and featured in their first Ligue 1 fixture against Strasbourg, but he was given a second yellow card for a dive in the 62nd minute as a late Kylian Mbappe penalty snatched a 2-1 victory.
He was therefore suspended for PSG's 3-1 defeat to Lens on Sunday, their first loss of the season, and he was a notable absentee from training on Thursday.
Galtier insisted Neymar not training was planned and he also confirmed the 30-year-old will play no part against Chateauroux in the Coupe de France on Friday.
"As for Neymar's absence in training that had been scheduled, as it was for all of the players who went to the World Cup," PSG boss Galtier told reporters.
"They were assessed by our medical staff and performance team.
"We decided as a group that Neymar, with everything he has experienced with his ankle problem, that he needed time for his ankle to recover."
Asked whether Neymar was expected to miss the following game too, a Ligue 1 home meeting with Angers on Wednesday, Galtier replied: "Just tomorrow."
Neymar was visibly upset after Brazil's penalty defeat to Croatia, with his hopes of winning a World Cup now looking slim with the next tournament occurring when he will be 34.
However, Galtier is not concerned about the former Barcelona man, saying: "I'm not at all worried about Neymar.
"Based on what he has been doing since the start of the season, he is full of desire to play and he wanted to play in the league game but was suspended. He was very disappointed.
"We are lucky to have a very committed Neymar here, but we need to keep an eye on him physically."
After Brazil's shock exit in Qatar, Argentina and France went on to play what many are calling the best World Cup final ever, with PSG's Mbappe and Lionel Messi playing starring roles as La Albiceleste ultimately won on penalties following a 3-3 draw after extra time.
Galtier hopes Messi receives a warm reception in Paris on his return having beaten France in the final, while saying Mbappe has not changed after winning the tournament's Golden Boot and scoring a hat-trick in the final.
"He [Messi] will not play tomorrow," Galtier explained. "Having discussed it with him, we want him to be ready for the following game.
"I hope he will be celebrated by our supporters. Leo Messi is a Paris national player and World Cup winner. We are lucky to have a player like Messi here.
"We also need to appreciate we have [Mbappe] at the club. Just like Messi, he had a brilliant World Cup.
"Kylian Mbappe quickly wanted to get back into competitive football after the World Cup. I feel he is a very intelligent guy who learns quickly, and he knows the general consensus around him has changed.
"He is a player with huge personality and character who is capable of managing that. We have Kylian Mbappe here on a daily basis and he is the same as before."
In the match, Galtier started Renato Sanches, Marco Verratti and Fabian Ruiz as the three midfielders in a 4-3-3 setup, after spending much of the season playing a 3-4-3 with two central midfielders.
The breakthrough came in the 24th minute when Lionel Messi assisted Kylian Mbappe for the opener, and that score would hold until Messi got on the end of a spectacular team move in the 78th minute, where Mbappe would return the favour with an assist for the second goal.
Mbappe then finished things off in the 82nd, again off an assist from Messi, and their chemistry drew praise from Galtier in his interview with PSGTV.
"We scored another two magnificent goals [in the second half]," he said. "Of course, the move from Leo [to] Kylian, [back to] Leo is an extraordinary goal on this difficult pitch, but it's also the third goal.
"The link-up between Leo and Kylian really worked well – it's very good for the team and it's very good for them. They are players that need to score and that's very good for them.
"It also allowed me to make changes to give certain players a break, and I liked the way that our midfield played too."
Skriniar was strongly linked with a move to Paris Saint-Germain last year, but no move materialised and the centre-back began renegotiating a new deal with Inter.
However, his agent confirmed on Monday that Inter's offer was ultimately rejected in December, and he has since made clear to the club they are in talks with other teams.
Skriniar, who was sent off in Monday's 1-0 defeat by Empoli, is widely expected to eventually sign for PSG, though Sistici refused to name the clubs he is speaking to.
"The truth is that the decision to place Milan Skriniar on the transfer market in the summer was made by Inter, obviously not by the player," Sistici told TeleNord.
"It was a choice by the club that led to a negotiation between Inter and PSG, of which we had obviously been informed. At a certain point, the negotiation broke down, and we had also been informed of this step, a decision that was not up to us and which the player accepted calmly, with professionalism and absolute respect for the contract.
"Last autumn, we responded to all the meeting requests made by the club. After a series of preliminary meetings, we presented our financial request and subsequently, at the beginning of November 2022, the club presented us with a proposal.
"About a month later, before Christmas, I communicated to Inter the decision not to accept their offer, a choice reiterated at the beginning of January, before the Supercoppa, when I also informed the managers [Giuseppe] Marotta and [Piero] Ausilio that we thought we were free to listen to offers from other clubs.
"Maybe it wasn't mandatory communication, but for the player and myself it was the most correct way to proceed, knowing that seriousness and transparency are the best way to proceed for us. I repeat, we have never missed any appointment with Inter."
He added: "We didn't talk about PSG, just as we didn't leak our and Inter's positions, given that with Inter we had agreed to handle the matter with the right confidentiality, in the interest of serenity and the performance of the team and of the player.
"There are contacts with some clubs. Not Italian [clubs]."
Inter coach Simone Inzaghi responded after the shock loss by saying the club were "trying to resolve" the situation with Skriniar, without clarifying whether he meant by selling the player or making a new contract offer.
At a similar time, PSG coach Christophe Galtier was also asked about Skriniar following the Parisians' 7-0 Coupe de France win over Pays de Cassel.
He did not offer much clarity either, though he acknowledged PSG were convinced last year they had done enough to sign him.
"I cannot say if he will arrive this winter [January], or this summer," he told beIN SPORTS. "He is a player we've been tracking for a long time.
"In fact, we thought that we had already got him last summer."
