Milwaukee Bucks won the Golden State Warriors 134-111 in the American Basketball Association on Thursday.
Pax managed to take advantage of Greece's Yannis Antikonmbo and his team mate Eric Bledso.
Bilesu finished the game with 26 points, six assists and Anticoncampo 24 points and nine rebounds.
The defending champions suffered a great deal in the match because of the absence of Diamond Green for a finger injury and Steven Currie was out of the game before the end of the third quarter with minutes.
The Warriors' series of victories has been suspended in eight consecutive games and lost for the first time at home this season but kept the top of the Western section with 10 wins in 12 games.