Police were called to reports of an assault in Golders Green Crescent, NW11 on Sunday, October 19 at 6:52 pm.
Officers attended the scene and found a 20-year-old man nearby with two stab wounds to his leg.
London Ambulance Service attended and the victim was taken to a north London hospital. His injuries were not life threatening and he has since been discharged.
No arrest have been made and police enquiries continue.
Anyone with information is asked to call 101, alternatively you can contact Crimestoppers anonymously on 0800 555 111 or visit www.crimestoppers-uk.org