Real estate developer Donald Trump has agreed to act as business and boxing manager for heavyweight champion Mike Tyson, a published report said Saturday.

Trump, the hotel and casino owner who bankrolled Tyson's successful title defense June 27 against Michael Spinks in Atlantic City, N.J., told the New York Times that Tyson had asked him "to serve jointly" as his career adviser and to help him with lawsuits against his current manager, Bill Cayton.Tyson is suing Cayton in an attempt to void contracts under which Cayton received one-third of all of Tyson's boxing earnings. Tyson received a little less than $21 million for the Spinks fight alone.

Although Trump would not disclose details, he said he would be paid a substantial fee, which he would donate to various charities. Trump said he would hire a boxing expert to help with decisions concerning future opponents.

The Times spoke with Trump by telephone on Friday. Neither Tyson nor his attorney, Michael Winston, could be reached, however, and Cayton would not comment other than to say: "There will be no compromise of any kind, no concessions. My contracts are fully enforceable and will be enforced."