Tomčíková represented Slovakia at the 2011 IIHF Women's World Championship. She was named Slovakia's Player of the Game for two games in the tournament, against the United States and Russia. Slovakia's coaches selected her as one of the team's Top Three players for the tournament. Tomčíková played in all five of Slovakia's games during the tournament, facing 250 shots in total, making 237 saves. She finished with a save percentage of 0.948, and a goals against average of 2.56. She had one win, and one shutout. She was named the tournament's Most Valuable Player, and her play was largely responsible for keeping Slovakia in the top division of women's IIHF play.