Horner had doubts about signing Ricciardo

As Daniel Ricciardo leaves the Red Bull garage for the final time, it's bound to throw up some memories of past times. Team boss Christian Horner rolled it back right to the start and revealed the decision to sign Ricciardo included doubt.

Horner doubted whether the Australian was the right man to make the step-up from Toro Rosso. Ironically, Horner was worried most about his ability to fight in battles. By the end of his tenure, Horner labelled Ricciardo as the overtaking king!

"When we had to replace Mark Webber, we were able to choose between Jean-Eric Vergne, Daniel Ricciardo and Kimi Raikkonen," Horner told ESPN.

"Meanwhile, many people think he is the best driver in terms of overtaking in Formula 1," concluded Horner.

Ricciardo won seven races in the Red Bull cockpit, and most of those include a poor Saturday with the 29-year-old coming from nowhere!