Lesbian opera star Patricia Racette and Welsh bass-baritone Bryn Terfel both earned rave reviews together in a 2010 Metropolitan Opera revival of Tosca. (It was remarkable because director Luc Bondy’s new production had previously opened to notably bad reviews with a different cast.) See if Racette and Terfel bring some of that same operatic tension and dynamism when they perform Puccini’s classic 1900 operatic thriller in a concert staging under conductor James Conlon with the Chicago Symphony Orchestra at the Ravinia Festival. Tosca plays at 7:30 p.m. Saturday, July 30, at 418 Sheridan Road, Highland Park. Pavilion tickets are $70-$100, while lawn passes are $15. Call 847-266-5100 or visit www.ravinia.org. Photo of Racette by Devon Cass