He is the grandson of Puerto Rican Don Q rum magnate Félix Juan Serrallés Jr., the president of Destilería Serrallés headquartered in the same town and grandson of the late Puerto Rican entrepreneur, industrialist and inventor Efraín D. Vassallo Ruíz of Industrias Vassallo fame.

[2] In 2010, Serrallés raced in Europe, taking part in the Formula Renault UK Winter Cup for Fortec Motorsport as a guest driver.

He continued his collaboration with Fortec into 2011 and the Formula Renault Eurocup, scoring eight points-scoring finishes on his way to twelfth place in the series standings.

[3] Serrallés contested the Toyota Racing Series in January and February 2012 with Giles Motorsport, finishing ninth in the championship with a win at the New Zealand Grand Prix meeting at Manfield.

[5] At the opening round of the season at Oulton Park, Serrallés qualified on the front row for the third race of the meeting, and after beating Carlin's Jack Harvey off the grid, Serrallés held his own in the lead and eventually claimed victory, becoming the first Puerto Rican to win in the series.