Iga Swiatek admitted she was running on empty at Wimbledon as the exhausted world number one suffered a shock third round defeat against Yulia Putintseva on Saturday. The top seed’s 21-match winning streak came to a stunning end on Court One as Russian-born Kazakh Putintseva battled to a 3-6, 6-1, 6-2 victory. Swiatek won a fourth French Open and fifth Grand Slam title last month, but she felt the strain of that clay-court triumph by the time she arrived at the All England Club. Unable to summon up the energy required to subdue the feisty Putintseva, the Polish star once again flopped at Wimbledon, where she has never gone beyond the quarter-finals. “For sure, I felt like my energy level went down little bit in the second set. I couldn’t really get back up,” she said. “My tank of really pushing myself to the limits became suddenly empty. I was kind of surprised. But I know what I did wrong after Roland Garros. I didn’t really rest properly. “I’m not going to make this mistake again. After such a tough clay court season, I really must have my recovery.