The hockey world is reeling after a top player was killed in a on-field accident in Perth.

The WA Today newspaper reports that 24-year-old Lizzie Watkins was playing first-grade hockey for the North Coast Raiders team with her sister, when the ball struck her on the head.

It is believed the ball may have deflected off her own stick.

Watkins was revived after she collapsed on the field, but she died on the way to hospital.

News of her death spread quickly through the hockey community, with Olympic gold medalist Jamie Dwyer taken twitter to express his condolences.

"All the kookaburras thoughts are with the Watkins family after the devastating news today. Such a sad day in the hockey world," he wrote.

As a mark of respect the Australian men's team wore black armbands in the final of their Olympic test event in London.

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