Vera Zvonareva and Sabine Lisicki visited the Porsche Research And Development Center on Tuesday.
The Porsche facility is situated in Weissach, which is about 30 kilometers away from Stuttgart.
Vera Zvonareva and Sabine Lisicki took three Porsche models around the 2.88 kilometer Hill Course.
Sabine Lisicki got into the Porsche 911 Turbo, though she said her favorite was the Porsche 911 GT3.
The visit was a rare opportunity and live testing had to be shut down while the players were there.
Both Vera Zvonareva and Sabine Lisicki were accompanied by experienced drivers during the laps.
Sabine Lisicki, who loves driving cars, said driving a few laps herself made the day perfect.
Sabine Lisicki is currently ranked a career-high No.13 and seems on the brink of breaking the Top 10.
Vera Zvonareva posed with the Porsche Boxster, but said her favorite was the Porsche 911 Turbo.
Unfortunately neither player could compete at the tennis event, but they certainly found a bright side.
During some down time between matches, Agnieszka Radwanska kept warm with a jog in the park.
In January, Agnieszka Radwanska had been stuck at a career-high of No.8 for 29 career weeks...
But she went from No.8 to No.6 after the Australian Open, and is now a solid No.4 in the world.
Before Agnieszka Radwanska, no Polish player had ever cracked the world's Top 10 on the WTA.
Fans voted Agnieszka Radwanska the WTA's Fan Favorite Singles Player in 2011.