These posters have been done a long time ago I think. I saw those or at least quite similair ones at the tournament site this year.
Magdalena Maleeva's last words at her send-off:
"There is a saying that there is no friendship in tennis, but I've proven the opposite. After all of them are here, it means that there is friendship and I want to thank them for being here tonight. I hope the fans are happy too."
My blog about my semester spent in China (bilingual in both German and English): http://crazillo.jimdo.com! Please feel free to make comments!!
They look similar to the style of the "Strong is Beautiful"-Posters, but are unqiue to Stuttgart I think. Julia also didn't take part in "SiB". Stuttgart featured actual "Strong is beautiful"-posters in their promo stuff this year if I remember correctly, maybe you saw those?