Daniel Ricciardo could be the dark horse in the 2018 Formula 1 World title race, believes Red Bull team principal Christian Horner.

Ricciardo finished in fifth spot in the 2017 Drivers’ standings, with the Australian a massive 163 points adrift of World Champion Lewis Hamilton.

Four-times title holder Hamilton identified himself, Sebastian Vettel, Fernando Alonso and Max Verstappen as the four strongest drivers in F1 in an interview this week.

But Horner insists Ricciardo should also be on the British driver’s radar and thinks he is on the verge of a breakout season.

“Lewis would be very foolish to underestimate Daniel,” Horner told Sky Sports News.