Ateneo de Manila University and Rizal Technological University trampled their respective rivals in women’s division of the Summer Grand Slam tournament at the Batangas Sports Complex, which got under way in Batangas City on Monday. The Loyola-based softbelles blasted their Sta. Maria, Bulacan rivals, 12-2, while the RTU side trounced the host squad, 5-2, in a pair of lopsided victories marking the start of the country’s premier softball tournament sanctioned by the Amateur Softball Association of the Philippines. In other results, UM Davao edged Cavite, 13-11, in women’s B, BulSU nipped Woodrose, 7-6, in women’s A, and Sta. Maria, Bulacan crushed Benguet, 10-0, in women’s A, while defending champion San Antonio ripped Calamba City, 6-1, in men’s Club category.