Panathinaikos, the Euroleague’s only undefeated club this season with a 9-0 record, greets Union Olimpija Ljubljana tonight. Coach Zeljko Obradovic’s squad has secured its Top 16 place but is still gunning to seal first place in Group B and a tip seed for the next round. Aris, fifth in Group C with a 4-5 record, greets Eldo Napoli, a win behind, in a game likely to prove crucial for a qualifying berth. The top five clubs advance. Olympiakos, second in Group A, is hosted by Prokom Sopot tomorrow.