For the 16 time in his career, Federer has reached a Grand Slam quarterfinal without a losing a set on the way. In the previous 15 times he achieved this, he went onto win the grand slam 5 times. He has achieved this 5 times at the Australian Open, 4 times at the French Open, 4 times at Wimbledon, and 3 times at the U.S. Open. The last grand slam he won where he didn't drop a set before the quarterfinals was the 2007 Wimbledon. Since then, he has not a lost set before a grand slam quarterfinals 7 times and not win the Grand Slam (only one did he even reach the final). Lets hope this year's Australian Open turns that streak around.