Mike Tyson's visa has been revoked by Associate Immigration Minister Kate Wilkinson.
Ms Wilkinson said the original decision to grant Tyson a visa was a "finely balanced call" and a letter of support from the Life Education Trust was a significant factor.
Her decision to revoke the visa was made after the Trust withdrew its support.
"Given that the Trust is no longer supporting the event, on balance, I have made the decision to cancel his visa to enter New Zealand for the Day of the Champions event."
Yesterday Tyson, a convicted rapist, brushed off criticism from Prime Minister John Key, saying there was nothing he could do about his entry to New Zealand.
The former world heavyweight boxing champion, 46, was to present his Day of the Champions talk in Auckland on November 15.
He was granted a visa despite serving three years of a six-year sentence for raping an 18-year-old woman in 1992.
Mr Key this week said the visa decision was "a line ball call'.
"I don't have anything personal against Mike Tyson, but I have something deeply personal against people who rape other people and commit crimes against women," said Mr Key.
Asked if he believed Tyson should be a role model, Mr Key said he did not know what Tyson would say.
Speaking from Las Vegas yesterday, Tyson said: "Fortunately, I am coming to New Zealand and there's nothing they can do about it and I'm so sorry, I'm sorry they feel disappointed and I'm just living my life."
- nzherald.co.nz and APN