Currently on a hot streak of winning 5 big titles(2 slams + 3 MS-1000 + regain #1 ranking) in the last 6 months. The previous 9 months before that he had 0 big titles and drop in ranking. He very much blows hot and cold. Will he sustain this and pull of a multi-year hot streak like Fed in mid 2003 to end of 2007? Or will his bubble burst very soon?