BEIJING (AP) – The biggest surprise on a dismal first day of Olympic tennis came from Ana Ivanovic, who didn’t even play. The top-seeded Ivanovic withdrew yesterday because of inflammation in her right thumb that has bothered her for several weeks. Her decision was announced after play was called for the day with only nine of 45 scheduled matches completed. Ivanovic decided to pull out after trying to practice on the eve of her opening match. «It was just too painful,» the Serb said. «I haven’t played at all the last 10 days. It’s one of the hardest moments in my career. I’m very, very disappointed.» Ten matches were suspended and 26 postponed. Serena Williams was interrupted with a one-set lead, and despite a long wait, Roger Federer never got on court. No one was more frustrated than Ivanovic, nursing a swollen thumb joint at the top of her hand. She said the injury may take another two weeks to heal, which makes her questionable for the US Open beginning August 25. «Hopefully it will be enough time,» she said. «I went through so many treatments in the last five or 10 days, but with this injury it just takes time.» She was already assured of losing the top spot in the rankings Monday to No 2 Jelena Jankovic. Ivanovic has led the rankings since June 9, the day after winning the French Open for her first Grand Slam title.