I'm not sure if it was Ferrari's fault. Seb said he didn't make a mistake that could of caused it, like running wide and damaging it on the harsh curbs. Unless it was a tyre defect, which is uncommon but not impossible, the only other explanation for it would be that they simply ran it too long and with the heat it just wore it down too much. I noticed when they were showing the replays that the left front tyre also looked like it had worn down to the canvas, but this was probably affected by the spin. Still, what would normally be a big flat spot was worn down to canvas so it looks as though they just pushed it too hard. Interesting that they didn't seem to lose performance first, which usually happens when tyres get old. Perhaps the track killed tyres but with such a short lap and new surface it meant almost nothing affected performance (shown by there being not much of a difference between Mercedes, Ferrari and Renault engines, and how close everyone kept throughout most the race).