A design based on a playing card? Why not! I was inspired by a pack of Bicycle playing cards for this design so I ran with it. Apologies for not making her outfit, or the jersey itself, checkered in appearance. It sorta hurt the eyes when I attempted that. There are some diamonds beneath the numbers on the arms. Team name is not set in stone, can be Harlequins too.
UPDATE: I changed the character pose and costume, though she would need a darker red to sit on a red jersey. More gold trim, to echo the Bicycle logo. New font for name.