The England attacking midfielder, who joined us from Aston Villa earlier this month, made his Premier League debut for City at the weekend.
Though it was a frustrating afternoon as we slipped to a 1-0 loss away to Tottenham, Grealish offered several tantalising glimpses of his vibrant attacking armoury.
And speaking on Sunday’s latest Matchday Live programme, former City central defender Onuoha was effusive in his praise for what the 25-year-old will bring to the City squad.
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“I think Jack Grealish is one of the most exciting attacking talents in English football,” Onuoha declared.
“He could be one of the best in this team which is a statement in itself because this club has the best players in the world.
“His performances are going to have to be at the very top to stay in the team.
“But when you have that desire and love of the game, that’s who you want representing your team.
“Everybody respects Grealish, but what he did at Villa is going to be different to what he does at City.”
Nedum’s excitement about Grealish’s arrival was echoed by Joleon Lescott, Onuoha’s fellow special guest on Sunday’s Matchday Live edition.
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And the former City and England central defender – who helped welcome Jack to the Club in a special interview last week - compared Grealish’s passion for the game to one of his new Etihad colleagues
“His mindset is similar to Phil [Foden]. He just loves to play football,” said Lescott.
“He’s taking it all in. There has been so much talk about his transfer but he only wants to play football.
“There were no English lads in the dressing room when he came to City that he had been away with for England at the Euros.
“So I think it was nice for him to see me there as a friendly face to see him.”