Substitutes Johan Manzambi and Ruben Vargas helped Switzerland stun 10-man Bosnia-Herzegovina 4-1 at the World Cup on Thursday to boost their hopes of reaching the knockout stage.

The pair came on in the 72nd minute with the score 0-0 and were an instant hit.

Two minutes later, Vargas' cross was cleared to Manzambi, who scored his first World Cup goal on an outstanding volley. Vargas netted the second himself in the 84th minute shortly after Tarik Muharemovic was sent off for a dangerous tackle, leaving Bosnia with 10 men.

Manzambi scored again in the 90th minute on a pass from Vargas, and captain Granit Xhaka converted from the penalty spot with the final kick of the game in stoppage time.

Ermin Mahmic scored in second-half injury time for Bosnia, who still have a legitimate chance of reaching the knockout stage of only its second World Cup.