In an uncharacteristically sloppy performance, Williams racked up nearly 50 unforced errors, and she was determined to start afresh when she faced Sara Errani yesterday.
“I definitely want to cut back on my unforced errors,” said Williams, who conceded a love-set for only the seventh time in her career.
“The fact is I was able to get through it. Tomorrow I start out at 0-0, so it’s important for me to let it go and just play a new match tomorrow,” she said.
There were far fewer problems for Sharapova as she continued her run of not losing a set so far in the Spanish capital with a comfortable 6-2, 6-4 win over world No. 51 Kanepi of Estonia.
“I was just happy to get past the quarter-finals,” said Sharapova who was due to face Ana Ivanovic for a place in the final.
“I feel like I’ve been stuck in this tournament so it’s nice to be in that stage. I felt like I was facing a really good clay court player today. A lot of her success has come on clay,” she said.
“So I was just really determined. I’m happy that I was able to win with that type of scoreline,” the Russian said.
Ivanovic sealed her place in the last four with a 6-3, 6-1 win over sixth seed Angelique Kerber, while seventh seed Errani ended Ekaterina Makarova’s fine tournament, 6-4, 6-3.