Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Tournament | 2007 | 2008 | 2009 | 2011 | 2012 | 2013 |
| --- | --- | --- | --- | --- | --- | --- |
| Grand Slam Tournaments | Grand Slam Tournaments | Grand Slam Tournaments | Grand Slam Tournaments | Grand Slam Tournaments | Grand Slam Tournaments | Grand Slam Tournaments |
| Australian Open | A | 3R | 2R | 4R | QF | QF |
| French Open | LQ | 2R | 1R | 4R | 1R | 1R |
| Wimbledon | LQ | 1R | 2R | 1R | 2R | 3R |
| US Open | 3R | 3R | 1R | 1R | 3R | QF |
Question:
How many sets were in the 2011 Australian Open Tournament?
Answer:
4R