"We're at the fourth grand prix and we've already got one of the drivers leaving and Kimi Raikkonen coming," BBC Sport quotes Horner as saying. "This combination of drivers in Mark and Sebastian has been one of the most successful in the history of the sport.
"They have won 35 grands prix and three constructors' championships. They've never really got on but they push each other, they're competitive and it's worked. Before changing anything I want to see how things settle down and how we move forward.
"When the time is right in the summer we will talk about the future. I have no problem with this lineup. They have been very successful for us. We'll sit down and discuss drivers when it's a bit more pertinent in the summer."
Webber himself said earlier on Friday that he is happy at Red Bull.