The paper explores the shifting patterns of diplomatic engagements and contestations between Nigeria and South Africa. This is against the backdrop of historical hegemonic rivalries that have marked the relations of both states in the post-apartheid era. The thrust of analysis in the paper straddles the contentious issues in the contemporary relations between the two states, particularly their competitive quest and bid for UNSC seat, differing roles in the recognition of the Transitional National Council in Libya, and Post-election violence in Cote d'Ivoire. The implications of such diplomatic contestations for Africa's sustainable political progress are also underscored. The paper adopts descriptive historical analysis based on secondary data to anchor its analysis and submissions. It posits that the apparent antagonistic posture of both states in their contemporary relations portends negatively for Africa's sustainable political future. The paper recommends a paradigm shift from hostility to cooperation between the two states, noting that their potentials and strategic interests can be better severed when they work as partners in navigating the challenges of international environment in a rapidly-changing world order.
Keywords: Hegemony, bilateral relations, diplomacy, postapartheid, sustainable development.