Qualifier Oscar Otte knocked out No.7 seed Jan-Lennard Struff 6-4, 6-3 in an all-German matchup during the first round of the bett1HULKS Indoors in Cologne.
Steve Johnson also won a first-round upset, beating fifth-seeded Filip Krajinovic of Serbia 3-6, 6-4, 6-4.
Sixth-seed Hubert Hurkacz of Poland, Austrian Dennis Novak, Radu Albot of Moldova and German wild-card entrant Mischa Zverev all progressed.
In Sardinia wild-card Lorenzo Musetti beat No.8 seed Pablo Cuevas of Uruguay 7-6 (4), 7-5 in day one of the event at Santa Margherita di Pula, Sardinia.
Musetti, 18, will meet Italian qualifier Andrea Pellegrino in the next round after his opponent Stefano Travaglia retired while trailing 5-6, 7-6 (7), 3-0.
NO.7 seed, American Tommy Paul, and Czech Jiri Vesely both won their openers.
Doping sanction victim Simona Halep has gone online to protest her own treatment by anti-doping…
Rafael Nadal lined up for what was to be the final match of his career…
Jannik Sinner took charge in front of his home crowd on Sunday, crushing ATP Finals…
Daniil Medvedev went into meltdown mode on Sunday during a highly charged 6-4, 6-3 loss, with opponent…
Jannik Sinner could well be missing from the opening European clay event of next season…
Rafael Nadal will bring down the curtain on his career next month as he plays his…