If it's one of the best shots you've ever seen in your life, then you don't know very much about tennis (at very high level). you just, for example, have to watch Justine against Serena at FO (Justine had some very great shots), or at Wimbledon (where Serena had incredible passing shots !!!)
For sure, Chanda made a great great great shot : I myself was surprised of it ! But not one of the bests !!
And I don't think Chanda would be pleased to hear that it's the best shot she ever had ! She probably had better ones !