Osaka lost in a deciding tie-break to Amanda Anisimova in the third round.
Farrell will not attend next week’s pre-tournament training camp.
"My expectation was whoever it would be." Ash Barty is ready for Amanda Anisimova at the Australian Open.
Against Leeds, Eddie Howe will be aiming to choreograph Newcastle’s second win of the season before their trip to Saudi Arabia for a training camp