One's again hit hard following server issues during court proceedings (6,4)
I believe the answer is:
tennis ball
This clue could be a double definition.
'one's again hit hard' is the first definition.
(something hit during a game of tennis)
'following server issues during court proceedings' is the second definition.
I know that both 'server' and 'court' relate to this answer.
(Other definitions for tennis ball that I've seen before include "Item for Wimbledon game" , "Wimbledon equipment" , "Something hit by racquets" , "Participant in rally" , "Bouncer" .)