It's not common to see athletes get new endorsement deals at the age of 73, but not many athletes have the legacy that Muhammad Ali has. Still widely regarded as "The Greatest" in the boxing world, Ali teamed up with Under Armour earlier this year to bring fans exclusive apparel and sneakers. To know surprise, the first sneaker in the Ali x UA line is a performance trainer. 

The Muhammad Ali SpeedForm Phenom debuts in a clean white, black, grey, and icy blue colorway, which undoubtedly would have looked good with Ali's smooth boxing style. As one would expect, this sneaker was built to train hard in, using details like SpeedForm technology, a molded 4D foam footbed, and full-length Micro G foam. Combining UA's reputation for innovation and Ali's elite status as one of the greatest athletes of all time is a perfect match for both parties.

You can buy this sneaker now for $119.99, at underarmour.com.