The Roma assistant coach says he is desperate to triumph over Lazio in Monday's clash as he is not particular fond of the Biancocelesti
The former Brazil defender spent four years with the Giallorossi as a player and says he and club captain [Francesco] Totti in particular would love to beat he Biancocelesti.
"I'd pay to play against Lazio. For me it would be a dream," he told La Gazzetta dello Sport.
"In Rome, the derby has a special meaning. If you win, it can change the season."
"We've had three defeats in the derby, now is the time to get back to winning. Like Totti, I also do not have a great fondness for Lazio. You cannot make a prediction."
Zago went on to reveal that he was overcome with emotion when he got the post as assistant coach of the club.
"It was an indescribable emotion. When I came back inside I locked myself in the bathroom and cried," he revealed.
"The sports culture in Rome has a special meaning. I think a player who has history with Roma cannot play for Lazio. With AC Milan and Inter, they happen to exchange players.
"It’s always a special game. From the first day I arrived in Rome in 1998, I realised how important the derby is."
Lazio fell to a 2-0 defeat to Fenerbache last week and the 44-year-old hopes that will work in his side's favour.
"I think they will suffer from the match played on Thursday in Turkey." he added.