Investigators have arrested a man on suspicion of murdering Tyreke Watson in Tottenham.
The 21-year-old was arrested shortly after midnight on Wednesday, 24 February.
Watson, 21, was fatally stabbed on West Green Road, N15, at approximately 16:00hrs on Monday, 22 February.
Watson was pronounced dead at the scene despite the effort by the emergency services.
His family have been informed and are being supported by specialist officers, the police said.
The suspect remains in custody at an east London police station.
The police are appealing to anyone with useful information to call the incident room on 02083581010 or tweet @MetCC with the reference CAD 4438/22FEB
Alternatively, information can be provided to Crimestoppers anonymously by calling 0800 555 111.