During the matches of Jankovic's, esp when she plays the top players, she always display her trademark sarcastic smile, esp when she loses a game or a set.
most of all it is extremely unsporting when she keeps turning round to carry a conversation with the spectators and laugh. Perhaps Jankovic should consider a career in Hollywood instead. She obviously forgot that she is playing competitive tennis on the courts.
And if Jankovic thought that by doing so she will gain more praises, she is so wrong, because no one will not fall for her irritating tricks. Everyone who know all about the real sports of tennis can see through her pretences.
any new-comer should also take a page off Jankovic's books and NOT do the same because it will backfire and will harm your tennis career.