Kerber goes from champ to first-round loser

The question was rather simple after Angelique Kerber became only the second defending U.S. Open champion in the professional era to lose in the first round.

The surprisingly lopsided 6-3, 6-1 loss to 45th-ranked Naomi Osaka of Japan under the closed roof in Arthur Ashe Stadium at a rainy Flushing Meadows on Tuesday was former No. 1 Kerber’s latest in a long list of disappointing performances in 2017, so she was asked what she thinks went wrong this season. She sighed, shrugged her shoulders and began to answer: “I don’t know.”

Moments later, her eyes darting around the room, she added, “This year is a completely different year.”

Talk about an understatement. In 2016, Kerber broke through to the top of tennis in a spectacular way. A player with only one previous Grand Slam semifinal appearance reached the first three major title matches of her career, winning two of them. She stunned Serena Williams in the Australian Open final, lost to Williams in the Wimbledon final, and then beat Karolina Pliskova in the U.S. Open final to rise to the top of the WTA rankings for the first time.

Her follow-up has been quite a flop. Kerber, a 29-year-old German, hasn’t won any title of any sort this season. She is only 25-18 overall, 0-9 against opponents ranked in the top 20, and Tuesday’s loss assured her of falling out of the top 10 for the first time since October 2015.