William Smith College first-year Alex Greenberg was a double winner for the Herons on Sunday as they knocked off Union to secure a spot in the Liberty League Tournament. In singles play she bested Mina Hsia 6-2, 6-0 in the number-two spot to improve her record to 14-9 this season. At second doubles, she teamed with junior Katarina Kostovic for a 8-0 sweep. Greenberg and Kostovic are 9-3 in doubles play this spring.