Two-time Formula One world champion Fernando Alonso is confident he can claim a third world title before he retires despite well-documented issues with his McLaren-Honda.

At 34 years of age, the Spaniard is fighting a battle against time and a car that allowed him to finish in the points just twice last year, as McLaren embarks on the second season of their partnership with Honda.

Alonso missed last year's Australian Grand Prix with concussion after a steering issue with his McLaren caused a high-speed collision during testing in Barcelona.