Olympiakos beat visiting Le Mans 80-76 last night to stay a game behind Euroleague Group A front-runner Tau Ceramica. Playing in France Wednesday night, Aris lost 77-62 to Pau-Orthez in a Group C game that began with the clubs sharing fifth spot. The French team, now on a 6-5 record, moved up to equal third, catching up with Benetton Treviso, a 68-60 loser at home against defending champion CSKA Moscow. Aris remained fifth. The top five advance to the next stage. Group B leader Panathinaikos, undefeated, was greeted by Roma later last night.