Fernando Alonso has warned Nico Rosberg that he could yet miss out on the championship this year, insisting "anything can happen".
However, the two-time world champion insists that if the German does triumph over team mate Lewis Hamilton, he will have deserved it.
"Apart from last year, when Lewis was superior, the two have been very competitive and very close," Alonso told Spanish journalists at Interlagos.
"The first year (2014) the title was decided in the last race, and the difference between them now again varies between circuit and circuit.
"Nico has shown that he is a very consistent driver and generally they have been very evenly matched," he added.
Although a win for Rosberg in Brazil will guarantee him the crown with a race to spare, and a second place would mean a mere points finish in Abu Dhabi will be enough, Alonso has warned that something out of Rosberg's hands could be the deciding factor.
"I have been in these positions and not won. I know that anything can happen and reliability can play an important factor."
Bahrain International Circuit - Winter testing