The 21-year-old Nigerian has emerged as one of Serie A’s finest talents in recent times, with his combative yet technical approach having earned much praise.
But despite his early promise, Lazio are rumoured to have slapped a £10m valuation on his head and are willing to discuss his sale.
This has alerted Liverpool and Spurs, who are both in the market for additions this summer.
Liverpool appear to be frontrunners for the youngsters, with the Reds having shown signs of interest during January.
They have also been further buoyed by Onazi suggesting that a move to Anfield would be attractive to him:
“Liverpool? They are a huge team and are attractive to any footballer.
“I could see myself playing for them. I would jump at the chance.”
Tottenham are also in the battle despite the uncertainty surrounding Tim Sherwood’s role as manager.
Chairman Daniel Levy is said to be willing to spend ahead of appointing a new chief, with avoiding the transfer issues of last summer a priority at White Hart Lane.