Italian veteran Valentino Rossi struck a blow for the over-40s with a sizzling performance to top Saturday’s third practice session ahead of Sunday’s San Marino MotoGP. The 41-year-old seven-time champion produced a fastest lap of 1min 31.861sec, outside the track record of 1min 31.629 sec but quick enough to head the overall practice times and qualify him directly for Q2 …