Tennis-Sabalenka, Andreeva make winning starts at WTA Finals
INDIAN WELLS, CA, Nov 9 (Reuters) - World number two Aryna Sabalenka got her WTA Finals campaign off to a winning start with a hard-fought victory over Karolina Muchova, while Mirra Andreeva eased past Elina Svitolina as Group 2 action got underway on Monday.