2011 Petra Kvitová tennis season
The 2011 Petra Kvitová tennis season officially began at the 2011 Brisbane International , the first of two simultaneous events which opened the official 2011 season . 
<triplet> 2011 Petra Kvitová tennis season <subj> 2011 <obj> point in time <subj> 2011 <obj> point in time <subj> 2011 <obj> point in time <triplet> 2011 Brisbane International <subj> 2011 <obj> point in time <subj> 2011 <obj> point in time <subj> 2011 <obj> point in time <triplet> 2011 season <subj> 2011 <obj> point in time <subj> 2011 <obj> point in time <subj> 2011 <obj> point in time