Yahoo Sports reports: Breanna Stewart had 14 points, 12 rebounds and a career-high seven blocks to help the New York Liberty beat the Washington Mystics 86-64 on Sunday and clinch a spot in the Commissioner's Cup championship game. Jonquel Jones scored 17 of her 20 points in the second half to lead the Liberty (10-4), who have won seven straight games. The Liberty have made the finals of the mid-season tournament three times, winning once and losing once.