With Tucson’s loss of football’s Copper Bowl, and the holiday Fiesta Bowl basketball classic at McKale Center — the UA will not be playing a home basketball game during the holidays for only the fourth time since 1984 — the enduring game in town over the holidays is tennis. The USTA Winter Nationals will again be held at seven Tucson venues, centered at the Reffkin Tennis Center, from Dec. 27 to Jan. 2, a tournament that Jim Reffkin has fostered for two decades, and now carried on by his tournament director Meghan Houk. Reffkin’s USTA tournaments probably fill as many hotel rooms in Tucson as any sporting event all year.