![American swimming star Michael Phelps, second right, practises during a promotional event for sportswear brand Under Armour in Shanghai, China, 7 Nove Stock Photo - Alamy American swimming star Michael Phelps, second right, practises during a promotional event for sportswear brand Under Armour in Shanghai, China, 7 Nove Stock Photo - Alamy](https://c8.alamy.com/comp/W83X9J/american-swimming-star-michael-phelps-second-right-practises-during-a-promotional-event-for-sportswear-brand-under-armour-in-shanghai-china-7-nove-W83X9J.jpg)
American swimming star Michael Phelps, second right, practises during a promotional event for sportswear brand Under Armour in Shanghai, China, 7 Nove Stock Photo - Alamy
![Twitter 上的Under Armour:"No one else has been as unbeatable in the pool as @ MichaelPhelps #RuleYourself 🇺🇸 https://t.co/BvdjeD2ULA" / Twitter Twitter 上的Under Armour:"No one else has been as unbeatable in the pool as @ MichaelPhelps #RuleYourself 🇺🇸 https://t.co/BvdjeD2ULA" / Twitter](https://pbs.twimg.com/media/Cpx5eqCWIAApxCt.jpg)
Twitter 上的Under Armour:"No one else has been as unbeatable in the pool as @ MichaelPhelps #RuleYourself 🇺🇸 https://t.co/BvdjeD2ULA" / Twitter
![Michael Phelps Teams with Under Armour for 'Rule Yourself' Campaign Pre-Summer Olympics!: Photo 3602343 | 2016 Summer Olympics, Memphis Depay, Michael Phelps Pictures | Just Jared Michael Phelps Teams with Under Armour for 'Rule Yourself' Campaign Pre-Summer Olympics!: Photo 3602343 | 2016 Summer Olympics, Memphis Depay, Michael Phelps Pictures | Just Jared](https://cdn.justjared.com/wp-content/uploads/2016/03/phelps-teams/michael-phelps-underarmour-before-rio-olympics-03.jpg)