Thiem into quarters in Rio; favorite with Nishikori out

Spain’s Albert Ramos-Vinolas returns the ball to Italy’s Fabio Fognini at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Wednesday, Feb. 22, 2017. Spain’s Albert Ramos-Vinolas returns the ball to Italy’s Fabio Fognini at the Rio Open tennis tournament in Rio de Janeiro, Brazil, Wednesday, Feb. 22, 2017.