Serena Williams & Maria Sharapova Glam Up Before the US Open

Serena Williams shows off her amazing abs while making an appearance on The Late Show with David Letterman on Wednesday (August 20) in New York City.

The 32-year-old tennis player played a round with the host himself outdoors on 53rd Street!

PHOTOS: Check out the latest pics of Serena Williams

Maria Sharapova was seen out that same evening attending the Council of Fashion Designers of America’s 20th Anniversary of Fashion Targets Brest Cancer.

Both ladies will be playing at the US Open later this month. Serena is seeded in first while Maria is in fifth.

FYI: Maria is wearing a Marc Jacobs dress, Aquazzura shoes, a Porsche Design bag, and Melinda Maria earrings.

20+ pictures inside of Serena Williams and Maria Sharapova glamming up separately…