Naomi Osaka looking at 'bigger picture' in Billie Jean King Cup

Former world number one Naomi Osaka said she is not focusing on just results and is instead looking at the "bigger picture" having returned to tennis last year after giving birth.

The four-time major winner has not gone beyond the quarter-finals in six tournaments since her 15-month maternity break. Her last result was a third-round defeat to France's Caroline Garcia at the Miami Open last month.

Osaka has risen to 193 in the world rankings - from 831 - since her return. She next plays in the Billie Jean King Cup qualifier for Japan against Kazakhstan in Tokyo from Friday.

Osaka, 26, she was encouraged by her form.

"It's really tough to look at it results-wise," she said. "But I have to look at it in a bigger picture and try to expand on my game and expand on the knowledge that I'm constantly learning as a player."

Osaka described her second-round win over Ukraine's Elina Svitolina in Miami as encouraging.

"It was one of the better matches in my career, just in terms of execution," she said.

The World Cup of Tennis is back