By Brian Straus A World Cup tune-up friendly vs. Uruguay carries plenty of value, but all eyes will be on a qualifying playoff taking place across the Atlantic hours earlier. While the U.S. men’s national team continues preparing for this fall’s World Cup with Sunday’s friendly against South American power Uruguay, the game that’ll have the most impact on the Americans’ fortunes in Qatar will be played more than 4,000 miles to the east in Wales. Hours before the U.S. takes the field at Sporting Kansas City’s Children’s Mercy Park, Wales will host Ukraine in Cardiff to determine the last of Eur…