A woman was arrested after unrest broke out during a match last Sunday.
Goytre Women’s FC were playing Tonyrefail when witnesses said a visiting player was assaulted and knocked unconscious.
A red card was brandished to a Tonyrefail player and an ambulance summoned to take the injured woman to hospital as the referee called the game off.
South Wales Police said a 25-year-old woman from Tonyrefail was arrested on suspicion of assault and was bailed pending further inquiries.
The South Wales Football Association was investigating.
A spokesperson for Tonyrefail Welfare Ladies said: "The whole club is saddened by this event, and we would like to send our best wishes to those who have been affected by this incident."
‘Shock’ for Shropshire health chief listed in NHS top 10 as she praises work of staff
Crews tackle house fire in Ludlow
Revealed: The main roads in Herefordshire prioritised for repairs
Villagers fustrated over lack of road repairs
New Food and Drink group launched at online event