Google to Cite Rivals and Privacy in U.S. Lawsuit Defense

Google is expected in the coming days to be hit with the biggest U.S. antitrust lawsuit since the government went to battle with Microsoft Corp. two decades ago. Officially, the company hasn’t laid out its legal arguments yet. But piecing together submissions to other antitrust authorities, executive blog posts, and congressional testimony gives a picture of Google’s strategy.

Justice Department investigators have been probing whether the Alphabet Inc.-owned company uses its dominance of online search, web browsers, and advertising technology to unfairly block out rivals, pressure businesses into buying more ads, and benefit the rest of its digital ...