Google had been mulling HTC as a potential Nexus tablet partner since last year and HTC engineers have been flying to the Googleplex in Mountain View in recent months to work on the project, the report said.

Google's decision to pick HTC reflects its long-term strategy of building a broad base of partners from device to device to prevent any one manufacturer from gaining a monopoly, the report said.

That may also be one of the reasons why Google chose HTC over bigger rivals Samsung Electronics Co Ltd, maker of the Nexus 10 tablet.

Representatives at Google were not immediately available for comment outside regular U.S. business hours. HTC declined to comment on the report.