UPDATE 2-Motorcycling-Marquez wins, Rossi extends lead, Lorenzo falls 13.09.2015 20:33 Reuters Sept 13 (Reuters) - Valentino Rossi extended his MotoGP lead over luckless Yamaha team mate Jorge Lorenzo to 23 points at the San Marino Grand Prix on Sunday despite a strategy blunder that handed victory to Spaniard Marc Marquez.
