In a mid-season confrontation, struggling Hamburger SV (15th) needs a pivotal win against 14th placed 1. FSV Mainz 05 to revive their Bundesliga campaign. Mainz, who drew 1-1 with Bayern Munich last weekend, must maintain momentum with their strong recent form. A clash between HSV's top scorer Jann-Fiete Arp and Mainz's goal-scoring midfielder Jean-Philippe Mateta can be the turning point in this crucial match.