Swimming-Tunisian double gold medallist to 'boycott' Tokyo Games

July 20 (Reuters) - Tunisia's double Olympic swimmming gold medallist Oussama Mellouli has announced his international retirement, saying he had decided to "boycott" Tokyo despite qualifying for his sixth Games. The 37-year-old won 1,500m gold in the 2008 Beijing Olympics and the open-water marathon in London four years later, when...