The US Justice Department asked a federal judge on Friday to force Alphabet Inc.’s Google to sell key parts of its advertising technology and share realtime data with competitors to address a ruling that the technology giant illegally monopolizes much of the market for placing ads around the web.

Google now has to defend itself against a breakup of its online ad business while fighting a separate attempt by the federal government to force an unraveling of its online search empire.

In a hearing on Friday, lawyers for the Justice Depart. indicated the government would double down on its requests to break up the tech giant’s business.