Neptunas needed overtime to overcome Siauliai in Saturday's only Betsafe LKL fixture, with the second-placed visitors from Klaipeda scoring a 106-103 victory against to improve to a 16-4 record.
Despite their improved performances of late, the Antanas Sireika-coached club dropped to a league-worst 3-16 mark. They remain one game behind Nevezis.
Gytis Masiulis and Deividas Gailius paced Neptunas with 21 and 20 points, respectively, while Osvaldas Olisevicius chipped in with 16 points.
Meanwhile, Evaldas Saulys had a game-high 22 points for Siauliai, Antanas Udras scored 17 points, while Benas Griciunas and Antanas Urbutis finished with 13 points each.