Borops have beaten Goerges/Zahlavova Strycova 6-3 3-6 10-8 in the quarter-finals.
The first time Sarah has won a quarter-final at main tour level since her debut as a doubles specialist in July 2008 (she did reach a semi-final last year, but through a walkover).
They will play either the 2nd seeds Chaung/Peng or Dekmeijere/Schnyder in the semi-finals, who play tomorrow.