PARK CITY, Utah — U.S. teammates Summer Britcher and Emily Fischnaller are in first and second place going into Saturday’s final heat of a World Cup women’s singles luge race, a rare two-day, two-run format for the circuit.Britcher finished her run down the 2002 Olympic track in 43.291 seconds; Fischnaller finished in 43.295 seconds. Austria’s Dorothea Schwarz is third after one run, with a time of 43.324 seconds.The women’s race will end Saturday, as will the men’s singles race this weekend — which is also using the two-day format. Typically, both heats of a World Cup race are held in the same day.Men’s doubles and women’s doubles races are later Friday night, both in the traditional two-run, one-day format.At Lillehammer, Norway, reigning world champions Mystique Ro and Austin Florian of the U.S. finished second in a World Cup mixed skeleton race Friday, the first medal for the Americans in the headfirst sliding sport this season.Britain won the race with Tabitha Stoecker and Marcus Wyatt finishing their runs in 1 minute, 49.33 seconds. Ro and Florian finished 0.56 seconds back, just 0.02 seconds ahead of Germany’s Jacqueline Pfeifer and Axel Jungk.Britain also took gold in men’s skeleton, with Olympic favorite Matt Weston getting his second victory in two races this season. Jungk was second and Korea’s Seunggi Jung was third; both were within one-tenth of a second of Weston’s time of 1:42.58.In women’s skeleton, reigning overall World Cup champion Janine Flock o …