Fatigued women's tennis pro once beginning to debate umpire's call
I believe the answer is:
washed out
'fatigued' is the definition.
('washed out' can be a synonym of 'fatigued')
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for washed out that I've seen before include "Pale and tired" , "Pallid or faded-looking - following rinse?" , "Scrubbed" , "flat" , "exhausted" .)