George Russell and Yuki Tsunoda lead the Singapore Grand Prix fastest-lap market in a tight contest driven by Mercedes' recent one-lap and race pace alongside Red Bull's upgrades that boosted Max Verstappen's Malaysia victory. Russell benefits from strong qualifying form at Marina Bay despite a grid penalty for a power-unit change, positioning him well for late-race tire strategies on the demanding street circuit. Tsunoda's elevated probability reflects Red Bull's improved long-run pace and potential for aggressive soft-compound stints in the humid conditions. The bunched probabilities highlight how track evolution, one-stop dynamics, and physical demands create opportunities for multiple drivers to chase the point, with Antonelli, Verstappen, and others trailing due to championship focus or setup trade-offs.