VALENCIA, Spain, March 26 : Sweden are 90 minutes from a place in the World Cup finals after striker Viktor Gyokeres scored a superb hat-trick to sweep aside Ukraine on Thursday and set up a winner-takes-all playoff game against Poland in Stockholm on Tuesday. Playing in their alternate kit of blue shirts, shorts and socks, the Swedes took an early lead when Benjamin Nygren flashed the ball across the box and Gyokeres was on hand to stab it into the net from close range in the sixth minute,