Renault might insist there was no surprise with Red Bull's decision to team up with Honda in Formula 1 next year, but not everyone is so serene about it.

Plenty of voices emerged to question whether Red Bull's move is clever to swap a race-winning engine that could still yet clinch it this year's championship for a power unit that has never taken a car to a podium finish.

Chunks of hair have been pulled out at Red Bull over the years in frustration at Renault's progress (or lack of) at times, but Honda still has plenty of improvement to make before it can be considered a match for Mercedes or Ferrari. And that is before we get to see Renault's 'spec C' engine the manufacturer has high hopes for.