MILAN - After another two weeks without a world championship event, MotoGP returns to the track for the Aragon Grand Prix with Ducati theoretically the favorite over the thus far dominant Aprilia (just remember the Silverstone podium that the Noale-based manufacturer swept aside). The dominant theme on the challenging Alcañiz circuit, however, seems to be the less-than-perfect physical condition of nearly all the main riders, with perhaps only one exception: championship leader Jorge Martin. From Marc Marquez to his brother Alex, from Marco Bezzecchi to Pecco Bagnaia, no one is at their best. And one has already been forced to withdraw:…