|High School:||Academia Cotopax|
Last year Arellano represented Yale in three fall tournaments. In his sophomore year, he won his only singles match for the Bulldogs and also won his two doubles matches. He was awarded the Stuart D. Ludlum Award for team spirit his sophomore year. Born in La Paz, Bolivia, Arellano was ranked second in the country in the 16 and 18 & under divisions. He moved to Ecuador in his junior year of high school where he was ranked second in the Province.