Naomi Osaka sacks her second manager of 2019

Naomi Osaka during US Open. (Source: AP)

Twice Grand Slam champion Naomi Osaka has sacked her second manager in 7 months, bursting with Jermaine Jenkins in a arise of her unsatisfactory U.S. Open pretension defence.

Jenkins, a long-time attack partner of Venus Williams, transposed Sascha Bajin in February, weeks after Osaka’s Australian Open triumph.

“I’m super beholden for a time we spent together and a things we schooled on and off a justice though we feel like now is an suitable time for change,” a Japanese 21-year-old wrote on Twitter.

“Appreciate you, perpetually warmed by we … Thank we for everything, it was a blast.”

Top seed during Flushing Meadows, former universe series one Osaka struggled with a knee problem before being dissapoint by 13th seed Belinda Bencic in true sets in a fourth round.

It continued a formidable deteriorate for a energy hitter given her second Grand Slam pretension during Melbourne Park, with early exits during a French Open and Wimbledon.

The Australian Open win done her Asia’s initial universe series one and a initial actor of any republic to explain a initial dual Grand Slam titles back-to-back given Jennifer Capriati in 2001.

However, a tip ranking and a courtesy that goes with it valid a complicated burden, she admitted, after a weeping initial turn exit from a Dubai Duty Free Tennis Championships in February.

Australian Ash Barty after took a series one mark in a leadup to Wimbledon where Osaka crashed out of a initial round, observant a fun had left out of her game.

As Barty faltered during a North American hardcourt season, Osaka reclaimed a tip ranking in a leadup to a U.S. Open notwithstanding temperate form in Cincinnati and Toronto.

Her early exit from New York has seen her ranking slip to 4 behind universe series one Barty, Karolina Pliskova and Elina Svitolina.