Serena Williams stretched her lead over Maria Sharapova at the top of the WTA rankings after her victory in the Italian Open.
Laura Robson could not add Serena Williams to her list of recent scalps, the American seeing off the Brit 6-2 6-2 in Rome.
Round-up: Fourth seed Agnieszka Radwanska was knocked out of the Rome International second round by qualifier Simona Halep.
WTA rankings on Monday (last week's positions in brackets):
Serena Williams' tactic of staying in her hotel room and being "boring" appears to be paying off as she won again in Madrid.
Serena Williams was 'bagelled' for the first time in five years in her Madrid Open quarter-final - but won through anyway.
A laid-back Serena Williams breezed into the Madrid Open quarter-finals when she barely broke sweat in a 6-3 6-1 destruction of Maria Kirilenko.
Laura Robson missed the chance of reaching the quarter-finals of the Madrid Open after serving for victory over Ana Ivanovic.
Victoria Azarenka lost her temper in a surprise defeat by unseeded Ekaterina Makarova in the Madrid Open second round.
Serena Williams made it through to the third round of the Madrid Open with a straight-sets win over Lourdes Dominguez Lino.
The latest WTA rankings, with Maria Kirilenko up to 12th.
Laura Robson claimed arguably the biggest scalp of her career with a 6-3 6-1 hammering of Agnieszka Radwanska in the second round at Madrid.
Round-up: Serena Williams overcame a lethargic start to her Madrid Open defence to seal a 7-6 6-1 win over Yulia Putintseva.
The latest WTA rankings, with Ana Ivanovic moving up one place.
The latest WTA rankings, with Maria Kirilenko dropping one spot.
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