Erakovic and Spanish playing partner Arantxa Parra Santonja moved into the quarter-finals with a 6-2, 6-3 win over French duo Pauline Parmentier and Julie Coin.
They will face Lucie Hradecka and Michaella Krajicek in the next round.
It is the fourth time Erakovic has reached the quarter-finals of a Grand Slam.