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.
Team GB pulled off a 3–1 victory over Australia in the Billie Jean King Cup…
Jannik Sinner will take back the No. 1 ranking on Monday after winning his fourth…
Novak Djokovic has been making it plain that the end of his career is approaching,…
Jannik Sinner and Carlos Alcaraz fulfilled expectations on Saturday as the top pair in the…
Jannik Sinner put pure power on display Saturday as the Italian reached his first Monte Carlo…
Carlos Alcaraz earned the 300th win of his ATP career as the Spaniard rolled 6-3,…