The attack happened on Babis Farm Close between 10 and 11am when the woman, in her 20s, was allegedly punched in the face by a man, who police believe was known to the woman, in the cut-through area used by dog walkers.
A 26-year-old Saltash man was arrested on suspicion of assault and has been bailed until October 11. A 22-year-old man was also arrested on suspicion of assault but was released pending further enquiries.
Police are asking anyone who may have witnessed the incident to come forward. If anyone has any information they should contact PC Hodges at Saltash police station via [email protected] or by calling 101 quoting reference CR/083494/19.