Google CEO Testifies About Search Dominance in U.S. Antitrust Case 

WASHINGTON—Google Chief Executive Sundar Pichai took the stand Monday in the tech giant’s antitrust trial, a pivotal moment in a case that could result in major changes to the company’s search engine.

Google’s lawyers called Pichai as a witness as the trial entered its eighth week, seeking to undermine the Justice Department’s central argument that Google dominates internet search because of anticompetitive agreements that block rivals from gaining market share.