Kimi Raikkonen says he hasn’t a clue why his Ferrari suddenly spun out of control on his out-lap after his first pitstop, which threw away a podium finish in the Canadian Grand Prix.
Raikkonen was running a comfortable third at the time, having steadily dropped away from Nico Rosberg's second-placed Mercedes in the opening stint.
He described the moment as an identical one to last year's event, which was a problem that he believed had been solved over the winter.
"Not the result that we wanted," said Raikkonen of his fourth place. "The spin is exactly the same story as last year.
"No problems in practice, but on both outlaps there is something odd happening, it just gives a massive throttle release and you cannot control it. It's not ideal, but it is what it is.
"It's a very odd thing, because obviously we do practices and similar stuff. So far this year there's been no issues, so who knows?"
Of his race pace, Raikkonen said it was what he'd expected going into the race, but that fuel saving had played a major role: "The tyres were working more or less fine, but on this kind of circuit fuel saving was a big part and that really limited our speed today in the end."