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Longest time unbeaten in boxing

Longest time unbeaten in boxing
Who
Jimmy ‘The Mighty Atom’ Wilde
Where
United Kingdom (London,National Sporting Club,)
When
25 January 1915
Jimmy 'The Mighty Atom' Wilde (UK) remained undefeated from the start of his career for a total of 100 fights from 1911 to 1915. His run came to an end when he was defeated by Tancy Lee (UK) for the IBU and vacant British and European flyweight titles on 25 January 1915 when he retired in round 17 at the National Sporting Club in London.