World No. 13 Jelena Ostapenko admits in some matches she is her “worst enemy” but she is working on handling her emotions better. Ostapenko, a former world No. 5, has made a good start to the 2022 season as she made the St.Petersburg semifinal earlier this month and last week won Dubai. “Honestly, some matches I feel like I’m not fighting with the players but against myself. Sometimes when I get too much in the emotions I’m playing against myself, which I’m working on and I should get rid of it,” Ostapenko told the WTA website. “But I feel like the toughest opponent is myself. Not in all the matches, but in most of them. Because even when the score is close I still feel like I have a lot of potential and I have the reserves to put in when I’m playing that match. “I’m …