Justine Henin returned to action for the first time since winning the US Open with a 6-4 6-1 win over Dinara Safina at the Porsche Grand Prix.
Henin showed no signs of rustiness on her return
The Belgian world number one took nearly a month off after beating Svetlana Kuznetsova in New York for her seventh career grand slam title.
Fifth seed Ana Ivanovic failed to join her in the last eight, losing 6-2 1-6 6-3 to qualifier Kateryna Bondarenko.
Serb third seed Jelena Jankovic fought back to beat Shahar Peer 4-6 6-1 6-3.
Henin took just a little time to warm up, eventually making the decisive break in game seven of the first set.
She broke again at the start of the second set and completed a comfortable win in 74 minutes.
"I had a nice long rest after the US Open, and this was a very good first match back for me," said Henin.