Daniel Ricciardo is convinced Red Bull lost an opportunity for silverware in Bahrain with a retirement he described as 'the worst feeling – brutal'.
The Australian was tipped as a dark horse for Sunday's race, given Red Bull's extremely impressive long-run pace – and looked well positioned in fourth when disaster struck on just the second lap.
"I just lost all power, everything switched off without warning and I couldn't do anything," he said of his fourth retirement in the last six races.
"This sport can rip your heart out, it's brutal sometimes.
"Everyone in the team is so disappointed as we genuinely felt like we had a good car today. The weekend was going pretty good for us and I really believe our race car was even better.
"I know I only did one lap but I could already see Kimi sliding on the rear tyres. I really felt like we were going to be in with a good chance which makes it even more frustrating.
"Being out so early in a race is just the worst feeling; especially when it's a night race and you are up all day waiting for those two hours and after two minutes it's over. I get really fired up for Sundays so now I've got two hours of adrenaline stored up inside me and I don't know what to do with it."