tournament                    2006                    2007               2008 - 12                    2013
0  grand slam tournaments  grand slam tournaments  grand slam tournaments  grand slam tournaments  grand slam tournaments
1         australian open                      1r                      2r                       a                      3r
2             french open                       a                       a                       a                       a
3               wimbledon                       a                      1r                       a                       a
4                 us open                       a                       a                       a                       a

Table as JSON:
{"tournament":{"0":"grand slam tournaments","1":"australian open","2":"french open","3":"wimbledon","4":"us open"},"2006":{"0":"grand slam tournaments","1":"1r","2":"a","3":"a","4":"a"},"2007":{"0":"grand slam tournaments","1":"2r","2":"a","3":"1r","4":"a"},"2008 - 12":{"0":"grand slam tournaments","1":"a","2":"a","3":"a","4":"a"},"2013":{"0":"grand slam tournaments","1":"3r","2":"a","3":"a","4":"a"}}