Re: Simona Halep - Most Improved Player of 2013?
I have a feeling Marion will be on the shortlist, as she won her first GS in 2013. In this case, she'll be Simona's big rival.
Other important improvements this year: Kirsten Flipkens, Elena Vesnina, Stefanie Voegele & Yvonne Meusburger (but I guess she'll pass unnoticed).
Of course there were more improved players and I'm thinking Stephens, Hampton, Keys, Puig, Muguruza, Svitolina, Mladenovic, Bouchard and even Garcia, but all of these girls qualify better for Best Newcomer.