体坛英语新闻：Vidal and Sanchez's presence uncertain, says Chile's coach

SANTIAGO, Oct. 7 (Xinhua) -- The presence of Chile's star players, midfielder Arturo Vidal and forward Alexis Sanchez, in the first match of the World Cup Russia 2018 Qualifiers is not certain, announced the coach for Chile's national soccer team, Jorge Sampaoli, on Wednesday.

"These next few hours will be vital to whether Arturo and Alexis will play. Neither of the two are confirmed to face Brazil. They have not trained and have only done recovery work with the medics," said the coach during a news conference.

Chile will begin their road to the World Cup Russia 2018 on Thursday at the national Stadium of Santiago at 20:30 local time (23:30 GMT) against Brazil, their biggest rival, in the first match of the South American Qualifiers.

After recently winning the Copa America 2015 tournament, the South American team has been listed as one of the favourites in the competition.

In reference to Thursday's match, Chile's coach highlighted that "the idea is to try not to be dominated. We have sometimes been in control when playing against the big teams but not always."

"We need to control the transitions. Protecting transitions is more important than the system that we have in place," concluded Sampaoli.