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Movies like Lane 4 (2019)

Amanda, an introverted 12 year-old swimming athlete, finds safety in her own world: underneath the water. Lacking attention from her parents, she spends most of the time at the swimming pool, training and trying to succeed in maybe the only thing she truly loves. Priscila, an amazing swimmer, becomes her opponent, not only in the pool also in life. A subtle power game begins.