By Terry Daley ROME, Feb 1 (Reuters) - AS Roma coach Zdenek Zeman was left facing an uncertain future after his side were thumped 4-2 at home by Cagliari in Serie A in front of their angry home supporters on Friday. Rumours of Zeman's demise have been circulating in the Italian media all week after a terrible run of form has left Roma nine points off the third Champions League spot.