Pirelli is claiming to have found the cause of the punctures that raised concerns amongst drivers after F1 practice at the Belgian Grand Prix, pointing the finger at a piece of metal found close to the edge of the track at Fagnes.Both Sebastian Vettel and Fernando Alonso returned to the pits with deflated right-rear tyres, while other teams reported cuts and nicks in their rubber at the end of the session. Pirelli's Paul Hembery maintained that debris was to blame, rather than a repeat of the structural problems that blighted the tyres at Silverstone, but admitted that proof would be needed to put minds at rest.Following a search of the section between turns 13-15, where both Vettel and...
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