Christian Horner admits he will miss Mark Webber's approach to F1 when he walks away from the sport after this weekend's Brazilian Grand Prix.

The Interlagos race marks Webber's final outing in the sport before he makes the move to sportscars with Porsche in 2014, with the team having signed Daniel Ricciardo as his replacement.

Webber's decision to leave comes after a twelve year career in F1 that has seen him win nine times, although recent seasons have seen him very much in the shadow of title winning team-mate Sebastian Vettel.

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The Australian has clashed with the four-time title winner a number of occasions but despite the apparently fractious relationship between driver and team that developed, Horner said he would miss Webber's attitude when he departs.

"I'll miss his speed, his dedication, his forthrightness - despite that being uncomfortable at times - he calls it as it is," Horner told ESPN. "He's a competitor and I've known him for a long time since I tried to sign him in Formula 3000. It's been a great pleasure to see him to see him fulfil his potential at Red Bull Racing."

Horner admitted that there were things that could have been handled better with Webber across the years but insisted there had been more ups than downs in the seven year relationship between driver and team.

"There's always things with hindsight that you say we could have handled a little better, but that goes in both directions," he said. "In the seven years that Mark's been here, we as a team have done our very best to support him baring in mind he had one podium before he arrived and now he's got over 40 and nine victories and he's been a big part of our four constructors' victories. Inevitably there are going to be ups and downs in that period, but there have been more ups than downs.

"It's always going to be very tough for any driver going up against someone of Sebastian's quality and calibre. If he just rolled over and did that then he may as well have stopped then. What does he do? He keeps fighting and pushing."