Patrick Vieira praised Mikel Arteta's impact on Arsenal, saying the head coach had brought energy back to the club.
Arteta has been praised since taking the helm in December last year, having lost just two of 15 games in charge.
Former Arsenal captain Vieira, who was also linked to the job, hailed Arteta for his work so far at Emirates Stadium.
"When you're a Gunner, always a Gunner, so I'm watching them all the time, I watch their games," the Nice head coach told Ian Wright in an interview for Adidas.
"What is really interesting with Arteta is that he brings the energy back and it looks like they are playing for the club, but for the manager as well, and I think that is really important."
Vieira has been at the helm of Nice since 2018, and was linked with a return to Arsenal after Unai Emery was sacked last year.
The Frenchman said he wanted to manage a big club, but he is happy at Nice.
"I really don't know what the future will be, but doing this job it was like being a player," Vieira said.
"I wanted to play at a high level, I wanted to play for the national team, I wanted to go to the World Cup, I wanted to play with the best players and there is no doubt as a coach I have the same kind of ambition.
"I would want to manage a team that will have a chance to win the Champions League, to play the Champions League competition.
"But at the moment, honestly, right here at Nice I am in the perfect place, perfect place because I can fulfil my ambitions, the club is really ambitious and the club give me the tools to grow as a manager, but to be a part of a winning team and to play good competitions as well.
"The team is growing up really fast, really quick and hopefully I can get my ambitions with OGC Nice."
Vieira moved from Milan to Arsenal in 1996, spending the next nine years at the club, with a trophy haul that includes three Premier League titles and three FA Cups.