Stanislas Wawrinka beats Andy Murray, gains first Grand Slam semi Stanislas Wawrinka, shown at this year's French Open, defeated Andy Murray in straight sets Thursday in winning a spot in the semifinals of the U.S. Open. 5 (UPI) -- Stanislas Wawrinka stunned defending champion Andy Murray for a straight-set victory Thursday in the quarterfinals of the U.S. Open. Wawrinka didn't face a break point in a 6-4, 6-3, 6-2 win over Murray, advancing to his first berth in the semifinals of a Grand Slam event. He had been 0-3 in career major tournament quarterfinals. He'll go against either world No. 1 Novak Djokovic or 21st-seeded Mikhail Youzhny in Saturday's semifinals. Djokovic, who won the U.S. Open in 2011, and Youzhny were to play their quarterfinal match later Thursday. The other semifinal was set Wednesday with No. 2-seeded Rafael Nadal, the 2010 U.S. Open champion, advancing to meet eighth-seeded Richard Gasquet. Like Wawrinka, Gasquet is in his first U.S. Open semi. Wawrinka is 2-12 versus Djokovic, although he pushed Djokovic to 12-10 in the fifth set at the Australian Open this year. He is 2-3 against Youzhny. Their most recent meeting resulted in a five-set Youzhny win in the 2010 U.S. Open quarterfinals. Murray saw his 11-match U.S. Open winning streak end. Since beating Djokovic in the Open final a year ago, he was runner-up to Djokovic at the Australian Open and beat Djokovic in the title match at Wimbledon. Murray had won eight of his previous 13 meetings against Wawrinka but the Swiss player beat Murray in two sets in Monte Carlo and kept that success up Thursday. Wawrinka recorded the first break of the day, taking four of the last five points in a 21-point game in the final game of the first set. Wawrinka ran off 11 consecutive points in building a 5-2 lead in the second set. The third set turned on Wawrinka's break in the third game, which he consolidated with his fourth break of the day in the seventh game. Wawrinka ended up winning three-quarters of the points on serve and nearly half (50-of-109 points) off Murray's serve. He had 42 winners against 37 unforced errors while Murray had 15 winners and 30 unforced errors.