Arturo Vidal has again urged Bayern Munich to sign his Chile team-mate Alexis Sanchez from Arsenal this summer.
Sanchez, who became Chile's record goalscorer after netting against Germany in the Confederations Cup last week, has one year remaining on his Arsenal contract and has so far refused to sign an extension.
However, Arsenal have yet to receive a formal offer for the 28-year-old and the club fully expect him to return to pre-season training next month.
Vidal is with Sanchez at the tournament in Russia but he admits he remains in the dark regarding what the Gunners star intends to do next.
"We'll see if Alexis is coming. I do not know yet," Vidal told German newspaper Bild. "I know him very well. He is a spectacular player. And with him, we would surely improve.
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"We already have a lot of top-level players. We are the best club in the world."
Sanchez scored 24 Premier League goals for Arsenal last season but that was not enough to secure a top-four finish.
Chile will take on Portugal on Wednesday night in the last four, with either Germany or Mexico awaiting them in Sunday night's final in St Petersburg, should they win.
Chile head coach, Juan Antonio Pizzi, insists Sanchez is focused on his duties with the national team and has not been distracted by the speculation regarding his future.
"We think he's very happy," Pizzi said. "Everybody would like to be at the best clubs in the world, he is already at one, and everyone wants to have him in the squad. He's very focused and he knows exactly what he has to do.
"We will see what happens in the future. Right now he feels very comfortable and he's committed to the national team."