Emergency services were called to Stockwell Road just before 3.30am on Sunday.
A man was treated at the scene and taken to hospital “where his injuries were deemed not life-threatening or life changing”, Metropolitan Police said.
An investigation is ongoing.
A London Ambulance Service spokesperson said: “We sent an ambulance crew, an advanced paramedic, a tactical response unit and a medic in a fast response car.
“We treated a person at the scene and took them to a major trauma centre as a priority.”
Anyone with information is asked to call 101 and quote ref 882/27nov or contact @CrimestoppersUK.
It comes just days after a 16-year-old boy was stabbed on a Victoria Line Tube at Stockwell Undergound Station.
Police were called out on Wednesday just before 3pm to reports of a stabbing on a packed Tube train, finding the teenager suffering from potentially life-changing injuries.
On Friday morning, Amarjay Camron Nkemayang, 18, was charged with attempted murder and possession of an offensive weapon in a public place.
It is said he had a hunting knife with him during the incident, which happened at Stockwell Station.