Haye's February 8 match against fellow Brit Tyson Fury will now be cancelled.
It's the second time Haye has had to pull out of the fight; he previously cancelled in September after sustaining an eye injury.
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The Londoner was last heard from a week ago just days after posting online about her fears of being robbed.
The Professional Footballers Association says 302 players sought support in the first seven months of 2017.
Scotland Yard said it was investigating eight cases of fraud involving people allegedly claiming payments in the wake of the disaster.