Lotos PKO BP Gdynia dug themselves a big hole early on in the EuroLeague Women that they are still trying to climb out of.
But victory this week at Jolly JBS Sibenik in Croatia will be enough to seal the Polish giants' progression to the next stage and could allow Lotos PKO BP to leapfrog ZVVZ USK Prague into third place.
Jacek Winnicki, the Lotos PKO BP coach, said: "We must win in Sibenik - it's going to be the most important match during the season."
Lotos will be expecting a tough fight because in their first meeting back on November 6, they beat Sibenik by just three points.
That 79-76 triumph was a crucial one as Lotos PKO BP had fallen in their opening three encounters to Ros Casares, UMMC Ekaterinburg and Union Hainaut.
Last week, Lotos PKO BP avenged their 85-82 defeat at Union Hainaut in Valenciennes, France, with an 86-62 win in Gdynia to improve to 3-5.
"We had to win this match and we did," Winnicki said.
"We took one more step to the next round but we are still far from that."