Flavio Cobolli opens his Hamburg Open 2026 title defence against Ignacio Buse, a promising Peruvian clay specialist. Cobolli, now ranked No. 12, carries the pressure of defending 500 points after last year’s triumph but remains a favorite thanks to his solid clay-court and Hamburg record. Buse, ranked No. 57, has built momentum with consistent performances and impressive qualifying wins, but still faces challenges at this level. While Cobolli is expected to prevail, Buse is tipped to test him, potentially taking a set.