Spain’s Garbiñe Muguruza has won her first WTA Finals Championship and in the final, Muguruza defeated No.8 seed Anett Kontaveit of Estonia, 6-3, 7-5. Muguruza is also the first Spaniard to win the WTA Finals. In doubles, Czech’s Barbora Krejčíková and Kateřina Siniaková defeated Hsieh Su-wei ...