WATCH: Medvedev made a winning start to his Astana Open campaign on Tuesday.

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The ATP indoor season is in full swing this fall, but the top ATP stars took one of their last opportunities for an outdoor hit in the shadow of an iconic Kazakhstan landmark.

Top seeds Carlos Alcaraz, Daniil Medvedev, Stefanos Tsitsipas, and Félix Auger-Aliassime descended on the Baiterek observation tower to promote the Astana Open, which takes place this week.

Check out some of the best photos from the event:

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New world No. 1 Carlos Alcaraz and Stefanos Tsitsipas.

New world No. 1 Carlos Alcaraz and Stefanos Tsitsipas.

Former world No. 1 Daniil Medvedev and Félix Auger-Aliassime.

Former world No. 1 Daniil Medvedev and Félix Auger-Aliassime.

The 6'6" Medvedev finally found something taller than he is!

The 6'6" Medvedev finally found something taller than he is!