MEXICO CITY - Elina Svitolina put on the yellow and blue colors of Ukraine and beat Anastasia Potapova of Russia 6-2, 6-1 on Tuesday in the opening round of the Monterrey Open, deciding she could do more for her country by playing than boycotting the match. Top-seeded Svitolina earlier said she wouldn't play against Potapova in Mexico or against any Russian or Belarusian opponents until the International Tennis Federation and the men's and women's tennis tours barred competitors from those countries using any