The Mad Ants fell 110-98 to Austin on Friday.
It was their second loss in Memorial Coliseum in as many nights and their fourth home loss of the season.
The Ants (4-6) dropped two games below .500 for the first time this season.
Cam Jones led Fort Wayne with 25 points. Walker Russell Jr., playing for the first time with the Ants since being released from the Detroit Pistons training camp, added 24, including a 17-point third quarter.
Austin improved to 7-3.