Perched on the world's first suspension bridge between two peaks, the Peak Walk by Tissot, Jankovic and Mattek Sands geared up for this week's Ladies Championship Gstaad by playing what is most probably the highest altitude match of all time.
? Ladies Open Gstaad (@WTA_Gstaad) July 11, 2016
"I feel like I'm on top of the world and even though it is so scary, I am thankful for the opportunity to experience something like this!" Jankovic said.
Not content with a warm-up surrounded by some of Europe's most famous summits - including the Matterhorn, Mont Blanc and Eiger - afterwards Mattek-Sands went on the Alpine Coaster, the world's highest toboggan run.
"It's the first time in my life I've been so high up in the mountains. It is fantastic experience that will make my visit to Gstaad unforgettable. Actually, I think I can already say Gstaad is the best place I've ever been," she said.