CNN —He may have developed into one of the best players in the world, but Carlos Alcaraz is not immune to an off day. The reigning Wimbledon champion suffered a surprise defeat to Russia’s Roman Safiullin in the Paris Masters on Tuesday, the first time the 20-year-old has lost an opening round match at a tournament this year. There’s only one tournament left, but these losses hurt a lot.”Roman Safiullin produced a brilliant performance to peg back the world No. “For Carlos, it was not his best performance, but still I’m happy that I can win,” Safiullin said after the match. The Serb is set to start his Paris Masters campaign against Argentina’s Tomás Etcheverry on Wednesday as he looks to win his seventh title at the event.

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Persons: Carlos Alcaraz, Alcaraz, “, ” Alcaraz, Safiullin, Stephanie Lecocq, Reuters Safiullin, Carlos, ” Safiullin, he’s, I’m, Grigor Dimitrov, Novak Djokovic, Argentina’s Tomás Etcheverry Organizations: CNN, Wimbledon, Paris, Reuters, Shanghai Masters, Paris Masters Locations: Switzerland