The former PSL striker, who enjoyed successful trophy-winning spells with Mamelodi Sundowns and Kaizer Chiefs, says his bond with South Africa remains strong long after leaving the league.
While Colombia are also competing at the tournament, his household is split, with strong support for Hugo Broos’ Bafana Bafana.
Castro recently shared a social media post featuring his son Valentín wearing South African colours, saying it evoked pride and nostalgia .
"Today my son Valentín took these t-shirts out of his wardrobe, and it reminded me of what South Africa means to us,” he said.
"More than a place, it's a country that opened its doors to us and welcomed us with open arms.
"A country where we met incredible, kind, and always cheerful people who left a very special mark on our lives," Castro stated emotionally.