Ferrari's Sebastian Vettel has hit out at Pirelli after he suffered a tyre failure during the penultimate lap of the Belgian Grand Prix.
Vettel was running a one stop strategy and occupied third position when his tyre failed at Kemmel, dropping the German out of the points.
"Well how many laps was I missing? Not many," Vettel explained to BBC Sport in the immediate aftermath of the race, when asked if a one stop strategy was too audacious. "Things like that are not allowed to happen, full stop.
"If it happens 200 metres earlier [then] I'm not standing here now, I'm with 300 [km/h] stuck at Eau Rouge, so I don't know what else needs to happen.
"Upsetting...one thing is the result, for sure we deserved to finish on the podium, but if this happens earlier...it's unacceptable."
Vettel cited the lack of substantial evidence over the cause of Nico Rosberg's tyre failure during Friday practice as further proof that Pirelli needs to improve.
"[It's] the same as every time: "well -there was a cut, debris, bodywork, maybe the driver went wide... bulls**t.
"If Nico tells us that he didn't go off the track then he didn't go off the track, why should he lie to us? [It's the] same with me: I didn't go out of the track, just out of the blue it explodes and as I said, if this happens earlier, then I am f**ked. I think we need to talk to each other, it's probably not as bad as it was at Silverstone [in 2013] but it is not acceptable."