Carlos Alcaraz’s return to professional tennis was halted abruptly at the Shanghai Masters on Monday, as he was defeated in straight sets by Belgium’s Zizou Bergs. The 39th-ranked Bergs secured a 7-5, 7-6 (7-4) victory over the tournament’s second seed in the third round, marking the event’s most significant upset to date. Bergs will now face American Tommy Paul in the next round.

Alcaraz, a former world number one who has been recovering from a prolonged injury layoff, acknowledged that he struggled throughout the match. “Today wasn’t a good match from my side. I didn’t feel good,” the 23-year-old Spaniard said after nearly two hours on court. He credited Bergs for capitalizing on opportunities and delivering strong serves. “In a few important moments I didn’t play my best, and I would say there were a few moments that he was lucky,” Alcaraz added.

The loss followed a positive result just a week earlier, when Alcaraz won the Tokyo Open, signaling a promising return to form. Despite the setback in Shanghai, he remained focused on moving ahead. “Right now, you know, all the negative thoughts come to my mind and none of the positives, but I think I will take it, you know, the good things,” he said, noting that he plans to return home to continue practicing.

Alcaraz’s early exit has implications for the ATP rankings. With the Italian player Jannik Sinner sidelined for the remainder of the season due to a knee injury, Alexander Zverev—currently ranked world number two and the reigning French Open and US Open champion—is set to become world number one by the end of the year.

The Shanghai Masters continues to provide a platform for emerging talents and shifting dynamics, underscoring the competitive nature of men's tennis as the season nears its conclusion.