As the trial date nears in the high-stakes battle between Uber Technologies Inc. and Google Inc. driverless car unit Waymo, the two giants are disputing whether Uber chief legal officer Salle Yoo should be made available.

Yoo, who recently announced she's leaving Uber, has information that is “central” to Waymo's case, according to court filings.

In a Sept. 21 filing, Waymo indicated it plans to call on Yoo to “provide non-cumulative testimony regarding the Uber-Otto acquisition” and to testify about everything from the ride-hailing company's alleged misappropriation of trade secrets to the due diligence process ahead of the 2016 acquisition.