However, despite losing its main event, the show at the Brentwood Leisure Centre will go ahead.
The 21-year-old heavyweight from Greenwich, London, was gutted at having to pull out, and apologised to his fans.
He said: "In a sport like boxing, if you are less than 100 per cent health-wise going into the fight, then the only sensible option is to withdraw and go again on another date.
"It is bitterly disappointing for me, all the same, because I was looking forward to reaching double figures in professional fights before Christmas.
"That will just have to wait now and I can only say I am sorry to Razvan and the people who were coming out to watch me on Saturday night."
And his promoter Frank Warren added: “This is a big blow but the show must go on.
"I feel for the fans and for Razvan but if Daniel has got the flu, there’s no way I’m letting him fight.
"It’s important we still deliver to the live and the TV audience and they can look forward to seeing many of London’s finest boxing talents on Saturday night.”
Saturday night's show in Brentwood will go ahead as planned with 9-0 Super Flyweight sensation Sunny Edwards and Junior Granados clashing for the WBO Intercontinental Super Flyweight Championship.
Former British Welterweight Champion Bradley Skeete also returns to action and takes on Argentina's 16-2 Diego Ramirez.
Also showcasing their talents in Brentwood will be exciting super featherweight Ryan Garner (7-0), super welterweight Hamza Sheeraz (5-0), former Team GB flyweight Harvey Horn (3-0) and middleweight Caoimhin Agyarko (1-0).
Cruiserweight James Branch (2-0) is also in action and there are debuts for lightweights Mark Chamberlain (Portsmouth) and Mohammad Bilal Ali (Beckton).
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