Michael Chang won French Open in 1989 aged just 17 . Once it was retrieved , Chang charged through the decider , taking it 6-2 to claim his place in the tennis record books . Win over top seed Ivan Lendl in last 16 paved way for grand slam triumph . Chang famously served underhand in the fifth set against the World No.1 . Hide Caption 8 of 11
Michael Chang won French Open in 1989 aged just 17 . Win over top seed Ivan Lendl in last 16 paved way for grand slam triumph . Chang famously served underhand in the fifth set against the World No.1 . Hide Caption 8 of 11