David Haye has tweeted a picture of his injured shoulder which could force him into retirement.
Haye, 33, underwent surgery on Thursday to reconstruct his right shoulder which forced him to pull out of a scheduled fight with Tyson Fury, who reacted furiously to the news on Twitter.
The former world heavyweight champion said the operation was a "crushing blow" to his plans.
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Queen Elizabeth II is to celebrate her 92nd birthday with a star-studded line-up at the Royal Albert Hall in London.
Both figures were not taken seriously before being appointed to their huge roles, but the similarities don't stop there.
The US president, who has not visited the UK since being elected, is reported to be planning a summer trip to Britain.