The Senegalese striker has been strongly linked with a move to Orlando Pirates, but no deal has been made and Goal understands a formal offer is yet to be made by the Buccaneers.
Niang had a season to forget with United and is said to have grown increasingly frustrated at a lack of game-time, adding to his fears of not securing a regular first team role.
Niang is currently away on holiday and is out of the country, but as soon as he returns, the lanky striker is believed to be heading straight into talks with his business manager about his undecided future.
United have yet to give a definitive word on whether they are interested in keeping Niang, with coach Cavin Johnson persistently hinting last season that the 30-year-old does not suit his style of play.
Pirates continue to be the stand-out favourites to sign the attacker, but the University of Pretoria have emerged with an outside chance at luring Niang away from SuperSport, but still keeping him in Pretoria.