Super Eagles head coach, Jose Peseiro has warned his players they must be at their best to beat South Africa, reports Completesports.com. Nigeria will take on the Bafana Bafana in a semi-final fixture at the ongoing 2023 Africa Cup of Nations on Wednesday. The three-time champions have impressed many with their gritty display in Cote d’Ivoire. Peseiro however claimed it is important for the…