All that was left to be decided at the final Challenger of 2018 was who would win the men's Arroyo de la Encomienda Challenger 2018: Juan Tello and Federico Chingotto versus Alejandro Ruiz and Pablo Lijó. Tello and Chingotto started off stronger and punished Lijó and Ruiz for their moments of hesitation. They opened up a 3-0 lead but their opponents rallied back to make it 4-3. Alex Ruiz began to bring out his powerful shots and that caused problems for Chingotto and Tello. The Argentines just had a little bit too much in the first set though, which they claimed 6-3 in under forty minutes. Lijó and Ruiz struggled on serve from the start of the second set but managed to weather the storm and got it to 4-4. Chingotto and Tello played an inch-perfect game to break and make it 5-4 and from there serve it out to win 6-4. The Argentines claim their second Challenger of the season with their win at the Arroyo de la Encomienda Challenger 2018.