Dong Tam Long An fired Portuguese coach Francisco Vital on Monday following a poor start to the season.
Long An have just seven points from eight games, and are one place off the bottom of the V-League.
Assistant coach Ngo Quang Sang will take charge of the game against Xuan Thanh Sai Gon this weekend.
Former manager Marcelo Javier Zuleta is favourite to replace Vidal.
Three months ago, the Argentinean was fired because of a disagreement with the club's owners regarding signing foreign players.
Under Zuleta, Long An won the the Binh Duong Television International Football Tournament in 2011 and were runners-up in the Navibank Cup. — VNS