Have nothing to do with love (4)
I believe the answer is:
duck
'love' is the definition.
(love and duck mean zero in tennis and cricket)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for duck that I've seen before include "Steer clear" , "Dip" , "sails material" , "Part of pair" , "No runs in cricket" .)