EUGENE, Ore. – Alaia Rubio Perez and Nadine Arbaizer Martinez earned singles wins but the Portland women’s tennis team fell 4-2 to Oregon Saturday at the Student Tennis Center. The Pilots fall to 0-2, while the Ducks improve to 5-0. Portland dropped a competitive doubles point after the team’s No. 1 tandem of Sally Pethybridge and Rubio Perez earned a 6-2 win. The Ducks answered with wins at No. 2 and No. 3 to clinch the point…