Hamburg SV’s opening loss exposed a fragile shape; they conceded twice while struggling to press high enough to force Mainz into errors. If HSV can tighten their defensive line and win the midfield battles, they’ll create the chances they need, but their finishing quality remains untested after a goalless start. Mainz arrive with a clean sheet and a compact low block, looking to absorb pressure and launch quick transition threats through vertical passes from deep. Their set‑piece danger, bolstered by aerial presence, could punish any HSV lapses, while the Volksparkstadion crowd may raise the nerves for the away side. The game will hinge on whether HSV can break Mainz’s shape before the visitors spring a counter.