Isla has received a work permit endorsement from the Football Association and is currently in Italy obtaining his working visa before officially linking up with his new team-mates.

"He's a top player and we're delighted to have him here," QPR manager Harry Redknapp told his club's website.

"He showed his quality in the World Cup for Chile and it's a great loan signing for us.

"He's a versatile player, he's full of energy. I'm confident he'll be a really big asset for us this season"

Isla started all four of Chile's matches at this year's World Cup and has 51 caps for his country.

"I am very happy to be here - this is the start of an exciting new adventure for me," Isla said.

"Everybody knows that the Premier League is the greatest league in the world and the QPR proposal is very interesting and one I am very excited about.

"I hope this coming season is going to be great for both the club and myself. I will give 100 per cent in every game to help QPR in the Premier League."

Isla is Redknapp's fourth pre-season signing, his arrival at Loftus Road coming just 24 hours after the west London club, promoted via the Championship play-offs last season, paid around �6 million to land Cardiff midfielder Jordon Mutch.