maybe WTA wants to provide fans live Tv coverage for night matches.
Eurosport didn't show night matches live.
In Serbia SportKlub is broadcasting ATP tour and they are doing night matches live.
btw Eurosport won't show live Tokyo SF's & Final
WTA & ES are still in negotiations, so I won't be supriced if they make some agreement to show premier events in 2013. Who knows what might happen in next few months