The 22-year-old woman sustained injuries on her hands in the incident, they said.
The suspect (25), a native of Haryana, was studying MBA along with the woman at a college in Wakad, police said, adding that the attack took place outside the college premises.
He has been arrested under section 307 (attempt to murder) of IPC, they said.
According to the police, the suspect was pursuing the young woman for the last few months and it seemed to be one-sided love interest.
The woman's finger was badly wounded in the attack, he said, adding she is being treated at a private hospital here.
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