and how many indoor-matches did she play in the last 3 years, and against who?
Go ALG and beat her again
ALG indoor matches since beginning of 2006:
Hopman Cup 2006: losing to Stosur, Dulko and Krajicek in straight sets
Paris 2006: losing to Foretz in 3 sets
Memphis 2006: beaten Yoon-Jeong Cho in 2 sets, but losing to Perry in straight sets
Luxembourg 2006: losing to Knapp in 2 sets
Stuttgart 2006: winning against Malek in 3, but losing to Petrova in straight sets
Zurich 2006: losing to Hingis in 2 sets
Linz 2006: losing to Radwanska in 2 sets
Hasselt 2006: losing to Rezai in 2 sets
Antwerp 2007: losing to Razzano in 2 sets
Stuttgart 2008: losing to Venus Williams in 2 sets
Zurich 2008 (only qualification): beating Zheng and Wickmayer in 2 sets, but losing to Kvitova in straight sets
Her indoor record in maindraw matches since 2006: 2-12
with qualification in Zurich: 4-13
So only 4 wins (2 in maindraws) indoors is not very much. She lost 4 sets with 0:6 and 5 sets with 1:6.
Wins against Cho and Zheng indoors aren't very impressive. The match against Malek was very tight. So her only good win indoors in the last 3 years was against Wickmayer last week. But Wickmayer had still some problems with constance. Perhaps, she had a bad day in Zurich. If she finds her form from the first half of the year, she will definitely be able to beat Groenefeld.