""Babu" is short for Babuino (meaning Baboon in Portuguese), the name was given to Sergio when he was around 6 years old, according to Sergio himself. He started being called "Babu" around the estate where he grew up because of an incident with a ferocious dog which cut loose as him and his friends were playing in the estate's park. Sergio was very quick and jumped on a high wall to avoid the dog, while his friends were less agile and ended bitten by the animal. Because of his climbing abilities he started being called Babu."