A 13-year-old girl accused of assaulting another teenager in a suburban football match, leaving her partially blind and with spinal injuries, has been blocked by a court from playing and attending games later this month.

The Joondalup Children's Court on Tuesday heard the girls, on opposite teams, became engaged in a verbal slanging match about 10 minutes before the end of the game at Heathridge Park in Perth's north on June 8, after the accused expressed frustration with an umpire's call.

"You're a bit cheeky, aren't you?" the victim reportedly told the girl.

According to the police prosecutor, the accused then challenged her to fight.

The victim then said: "What are you going to do, look at the size of you."

The 13-year-old allegedly pulled the older girl's ponytail, and while she was trying to get the hair out of her face pushed her in the chest.

The victim fell to the ground and the accused allegedly "mounted" her and punched her in the face five to 10 times.

Team members pulled her off the victim, who was hospitalised with facial and spinal injuries.

Victim left with damage to eye, spine

The court heard the girl was left with pain and swelling in her head, face and eye.

The police prosecutor said she was left with "partial and potentially permanent blindness in her left eye".

She also suffered significant injuries to her spine and had to wear a neck brace for eight weeks. She may require spinal surgery.

The victim was not in court but the accused, who wore tortoiseshell glasses and a blue scrunchy with a hair clip, was supported by family members in the public gallery.

The accused's lawyer applied for a variation of bail conditions to allow the girl to play.

The lawyer said the WA Football Commission had already dealt with the incident, imposing a two-month ban, and argued she should be free to resume playing once the ban had expired later in August.

But the police prosecutor argued the existing bail conditions should continue, saying the conditions were set to protect other children in the sport.

Magistrate Stephen Vose said the WAFC suspension was a separate matter to the court process and his own deliberations.

"It seems to me it's something that's going to require a significant penalty and significant counselling," Mr Vose said.

"I would have thought it would be appropriate to say: 'no more football'."

Bail was extended and the teenager is due to reappear in court on September 18.