MALAGA, Spain — Aryna Sabalenka ends the year as women’s world No. 1, but anyone could make a convincing argument for Jasmine Paolini as WTA player of the year. After two Grand Slam finals, a new career high of world No. 4 and an Olympic gold medal in women’s doubles with compatriot Sara Errani, Paolini is a Billie Jean King Cup champion. She secured the title for Italy by winning the decisive rubber against Slovakia’s Rebecca Sramkova on Wednesday night, giving her country a 2-0 victory in the