Onazi has shared that he became suspicious of a youngster's behaviour while eating near Rome's Termini railway station yesterday, giving chase to retrieve a stolen wallet.
He told Lazio Style Radio: "I was having dinner with my brother near to the Termini Station and there were some tourists sitting next to us. I saw a boy and immediately felt due to his suspicious behaviour that he wanted to steal something.
"I didn't even have time to tell my brother that he had already snatched the tourist's wallet and run off. I noticed it, so I ran after him, but stayed on the other side of the street. I ran for 300 metres, the mugger left the wallet under a car, but I saw him.
"I chased him down and brought him back to the restaurant. I told the owner to call the police and we brought the wallet back to the lady. She was in tears and thanked me, as the wallet was full of money."
The Nigerian international has been at Lazio since 2011, becoming a first-team regular with an all-action style in central midfield.