Panathinaikos OPAP Athens never trailed to protect its home floor once again, downing the visiting Valencia Basket 91-72 on Friday night. In its 500th game in the EuroLeague this century, the six-time champions improved to 8-14 on the season, registering its third straight home win. Meanwhile, Valencia suffered its third consecutive loss, and sixth in the last seven games, to drop to 11-12.