Anderson advanced when Ivo Karlovic retired after one set Saturday .
Ferrer , who has lost a total of 26 games through three matches , will face No. 19 Kevin Anderson of South Africa for a place in the quarterfinals .
Kevin Anderson advanced when Ivo Karlovic retired after one set Saturday .
Ferrer , who has lost a total of 26 games through three matches , will face No. 19 Kevin Anderson of South Africa for a place in the quarterfinals .