Stunner! Defending French Open champ Ostapenko out on Day 1

PARIS (AP) — A year after stunning the tennis world by winning the French Open for the first tour title of her career, Jelena Ostapenko is again in rare company: a first-round loser as the defending champion at a Grand Slam tournament.

Ostapenko's high-risk game produced far fewer rewards than problems Sunday at Roland Garros, and she bowed out to 67th-ranked Kateryna Kozlova of Ukraine 7-5, 6-3 at Court Philippe Chatrier.

The result made Ostapenko only the second reigning women's champion to exit in the first round of the French Open a year later — it happened to 2005 winner Anastasia Myskina, too — and only the sixth at any major tournament in the professional era.