Nikolai Micallef is a 23-year-old professional football player from MLT. He currently plays for Hamrun Spartans, wearing the number 3 shirt. At the international level, he represents Malta U21. He plays primarily as a Defender.

Throughout the Malta Premier League 2025-2026, Nikolai Micallef featured in 20 matches, averaging 0 tackles, 0 interceptions, and 0 clearances per game, while blocking 0 shots per game.