Christian Horner has revealed that the battle to replace Mark Webber at Red Bull is set to be a three-way fight between Kimi Raikkonen, Jean-Eric Vergne and Daniel Ricciardo.

Toro Rosso duo Vergne and Ricciardo have long been mentioned as possible options to replace the Australian, even before news broke that he had inked a deal to move to sportscars with Porsche for 2014.

However, Raikkonen has also been linked with a switch to the defending champions, with his current deal with Lotus coming to an end at the conclusion of the 2013 season.

While the Enstone-based team is keen to keep hold of the Finn, who has impressed since returning to the sport last year, Raikkonen is currently keeping his options open and Horner said he would be an attractive option as the team seeks to find a new team-mate for Sebastian Vettel.

"We want the fastest line-up that we can and Kimi's obviously an attractive option," he told Sky Sports F1. "The youngsters [Ricciardo and Vergne] are attractive as well. We want to take our time and evaluate the options available to us, but the reality is that it's probably between those three."

Paul di Resta is another person who could be in the mix, with Force India having said it would release the Scot if the chance arose for him to move to a top team.

However, Horner said he didn't think the 27-year-old would ultimately be a contender for the seat.

"Obviously you've got to look at everything and everyone who's available," he said. "I'm not sure what Paul's situation is, but as I say, our focus will primarily be on those three guys."