Tarbes moved into the last play-off position in Group C of the EuroLeague Women with a 70-57 win over Galatasaray in France.
Alain Jardel's side won for the second time in a row and took over fourth spot with a 3-3 record.
Defeat for Galatasaray left the Istanbul giants 2-4 - a big surprise considering the one-two punch of USA Olympic gold-medal winners Sylvia Fowles and Seimone Augustus.
Fowles had 17 points and 11 rebounds but Augustus was five of 15 from the floor and finished with 10 points.
Tarbes, who got 22 points from Ana Cata-Chitiga, out-rebounded Galatasaray 40-30.
The hosts took control early.
With Tarbes behind 6-4, two Cata-Chitiga free-throws and a jump shot ignited a 20-2 run that put them in front to stay.
They led 45-30 at half-time and kept their noses in front the rest of the way, with Galatasaray getting no closer than eight in the fourth quarter.
France international Florence Lepron was excellent for Tarbes with 10 points and nine boards.
Jelena Dubljevic scored 17 points, grabbed six rebounds and handed out five assists for Tarbes but had eight of her team's 16 turnovers.
Ceyhyn Yildizoglu, Head Coach Galatasaray:
"Tarbes started this game very efficiently, a good defense on 5 on 5 game after our transition play. Congratulations!"
"Congratulations to Tarbes! They did a really good job. We have to stay focused, work more and then win games."
Alain Jardel, Head Coach Tarbes:
"The statistics show us that we played a very high level Euroleague game. I'm very satisfied that our young French player Ana Cata-Chitiga was the top scorer of this game"
Ana Cata-Chitiga, Tarbes:
"Our inside players had to focus in this game, we did a good job, and we did it against Galatasaray's players."