The 1-3-1 zone defence is a strategic basketball formation that features one player at the front, three in the middle, and one at the back, designed to balance defence against both inside and outside scoring. To maximise its effectiveness, teams must implement specific defensive strategies that emphasise player positioning, role understanding, and adaptability to counteract the opponent’s offence. Practising through targeted drills can enhance communication and execution within this defensive structure, ultimately improving team performance.