Simplify the following text for a Grade 10 native English-speaking person.
Original: In the octogonal formed part Racing Club , Argentino de Rosario , Club AtlÃ tico Tigre , Defensores de Belgrano , Club AtlÃ tico LanÃ s , Nueva Chicago and Deportivo MorÃ n.
Simplified: The other teams in the octogonal were Racing Club , Argentino de Rosario , Club AtlÃ tico Tigre , Defensores de Belgrano , Club AtlÃ tico LanÃ s , Nueva Chicago , and Deportivo MorÃ n. Gimnasia reached the final , where it defeated Racing Club twice , first 3-1 in Avellaneda , and then 4-2 in La Plata on December 30 , 1984 .