context: After his playing days were over, he became the coach of River Plate, where he won several national titles.
source: Passarella held to close friend Américo Gallego as assistant coach.
reference_original: Passarella baute auf seinen engen Freund Américo Gallego als Co-Trainer.
reference_flipped: Passarella baute auf ihren engen Freund Américo Gallego als Co-Trainer.