The attack happened about 12:30 a.m. near Lake Street and Wabash Avenue, according to CPD.
A male suspect punched the man in the face, and he fell down; then a second person hit the man on the back of the head while he was on the ground, Chicago police said.
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One of the two suspects stole the man's bag and cell phone before leaving, according to police.
The man's face is swollen, and he had a cut on his head.
No one is in custody, and Area Three detectives are investigating.