NEW YORK (Reuters) - Naomi Osaka did not appear to be too worried over her recent run of poor results in the run up to the U.S. Open and remained confident about chances of successfully defending her title at Flushing Meadows.

The world number three picked up the Australian Open title in February but after withdrawing from the French Open and skipping the grasscourt season to protect her mental health, she has struggled to regain her top form over the past month.