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.

Apple plans to participate in the U.S. antitrust trial against Google to defend its $20 billion annual search deal, arguing that Google can no longer adequately represent its interests amid efforts to break up its business units.

Apple (AAPL) has taken a significant step in the ongoing antitrust saga surrounding Google's search engine dominance, requesting to participate in the upcoming US trial.