This is just an instinct bet. I just watched the conclusion of the Brazil/Spain game, which ended in a 66-65 Brazil victory. The offenses of Brazil and Spain much more prolific than those of Lithuania and Nigeria, and they combined for only 131 points.
The only decent player Nigeria has is Michael Gbinije. Lithuania is led by a bunch of tall, fundamental white guys like Domantas Sabonis and Jonas Valanciunas.
Sure they can play, but these aren't the type of dudes who are about to go out and drop 30. Look for a slow-paced, methodical game from both sides and a low final score.