Two heavyweights in the US residential real estate market, Compass Inc. and Zillow Inc., are facing off in a New York courtroom in a legal battle that could reshape the future of how homes are marketed and sold in the country. Compass, the largest residential brokerage, sued Zillow in June claiming the real estate site acts anticompetitively by banning listings that were publicly marketed elsewhere first. A four-day hearing began Tuesday before a federal judge who will decide whether to temporarily block ...