Apple wants to join the antitrust case against Google, and it has explained why it doesn't want to create its own rival search engine.

Apple has asked to participate in Google's upcoming U.S. antitrust trial over online search, saying it cannot rely on Google to defend revenue-sharing agreements that send the iPhone maker billions of dollars each year for making Google the default search engine on its Safari browser.

In a declaration filed on Monday, Apple's senior vice president of services, Eddy Cue, asserted that Apple has no interest in creating its own search engine and would prefer to continue to use Google.