Four sponsors have dropped disgraced US Olympic swimmer Ryan Lochte, including swimwear manufacturer Speedo and fashion label Ralph Lauren.
They were followed by announcements from skin care firm Syneron-Candela and Japanese mattress maker Airweave.
Russia Paralympic team ban is 'beyond common sense'
Russia will discover on Tuesday whether it will be allowed to compete at next month's Paralympic Games in Rio.
The Court of Arbitration for Sport (Cas) is set to give its verdict on Russia's appeal against the International Paralympic Committee's (IPC) ban on all Russian competitors.
Fireworks went off over the Maracana as Rio said farewell to the Games
The Rio Olympics ended with a spectacular carnival-inspired closing ceremony, and the official handover to 2020 hosts Tokyo.
The colourful ceremony, lasting almost three hours, celebrated Brazil's arts and was held in a wet Maracana.
Germany beat Sweden to football gold
Germany won women's Olympic football gold for the first time with a 2-1 victory over Sweden in the final in Rio.
Dzsenifer Marozsan put Germany ahead at the Maracana with a curling finish, and Sweden's Linda Sembrant gifted them a second by scoring an own goal after Marozsan's free-kick hit a post.
Usain Bolt is undefeated in Olympic finals
Usain Bolt ended his Olympic career by claiming an unprecedented 'triple triple' and his ninth gold as Jamaica won the 4x100m relay final in Rio.
Bolt, 29, had won the 100m and 200m in Rio and is the only man to win all three sprint events at three Games.
