The photo is of Arvindan Ravindran, 24, who officers would like to speak to about a robbery in Montrose Gardens, Mitcham, on Wednesday, July 30, and for an assault in Belmont Avenue on Sunday, September 7.
Mr Ravindran is described as an Asian man, approximately 5ft 3ins tall, of medium build with short black hair.
He has a long scar on his left forearm.
Ravindran previously lived in Middleton Road, Morden and Cedars Avenue, Mitcham and has connections to Croydon and Coventry and police say he may be in those areas.
Police would like to hear from anyone who may know of his whereabouts.
Members of the public with information are advised not to approach Mr Ravindran, but to contact Merton CID on telephone number 101 or Crimestoppers on 0800 555 111.
You can also send an anonymous message to Crimestoppers via the website: https://crimestoppers-uk.org/give-information/give-information-online/.