ATP action picked up speed in Vienna at the ATP 500 and in Nur-Sultan at the ATP 250. These are the Top 5 photos for Thursday.

1

Grigor Dimitrov

The Bulgarian ousted No. 3 seed Stefanos Tsitsipas, 6-7 (5), 6-4, 6-3 to move into the quarterfinals in Vienna. He'll take on Dan Evans next after the Brit beat wild card Jurij Rodionov.

Top 5 Photos 10/29: 
Dimitrov upsets 
Tsitsipas in Vienna

Top 5 Photos 10/29: Dimitrov upsets Tsitsipas in Vienna

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2

Stefanos Tsitsipas

The Greek would grind out the first set over Dimitrov but ultimately drop out in the round of 16. The Roland Garros semifinalist was playing in his first event since Paris.

Top 5 Photos 10/29: 
Dimitrov upsets 
Tsitsipas in Vienna

Top 5 Photos 10/29: Dimitrov upsets Tsitsipas in Vienna

3

Daniil Medvedev

The No. 4 seed in Vienna had to battle to reach the quarterfinals. He was tested by Canada's Vasek Pospisil in a 4-6, 6-3, 6-2 battle and will get Kevin Anderson next.

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Top 5 Photos 10/29: 
Dimitrov upsets 
Tsitsipas in Vienna

Top 5 Photos 10/29: Dimitrov upsets Tsitsipas in Vienna

4

Dominic Thiem

The No. 2 seed had a straightforward day in the office with a 6-3, 6-2 win over Cristian Garin. He'll have a stiff challenge in Andrey Rublev for a place in the Vienna semifinals.

Top 5 Photos 10/29: 
Dimitrov upsets 
Tsitsipas in Vienna

Top 5 Photos 10/29: Dimitrov upsets Tsitsipas in Vienna

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5

Mackenzie McDonald

Over in Kazakhstan, McDonald advanced to his first ATP quarterfinal of 2020 by easing past veteran Andreas Seppi, 3-6, 6-3, 6-3. He's one of five unseeded players vying for semifinal berths in Nur-Sultan.

Top 5 Photos 10/29: 
Dimitrov upsets 
Tsitsipas in Vienna

Top 5 Photos 10/29: Dimitrov upsets Tsitsipas in Vienna

@MackieMacster Instagram