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Costin injured in Rosehill trackwork spill
AAP
Winona Costin will have surgery after being injured in a trackwork fall.
The leading apprentice suffered a laceration to her leg while riding work at Rosehill on Thursday morning.
Costin's mother Trish told Racing NSW her daughter will be operated on in Sydney's Prince Of Wales Hospital.
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Last season's champion apprentice in Sydney, Costin has only recently returned to riding after she was injured in a race fall at Grafton in April.
Costin's book of five rides at Rosehill on Saturday included Ravi, favourite to make it back-to-back wins as the three-year-old takes on her own age over 1200m.