Between the excited crowd and world class play, the energy was electric on Day 2 in London. These are the Top 5 photos from Monday at the ATP Finals.

1

Alexander Zverev moved the ball around with the utmost precision and accuracy to post his first career win over world No. 1 Rafael Nadal.

Top Photos Nov 11:
Tsitsipas soars;
Zverev's zesty win

Top Photos Nov 11: Tsitsipas soars; Zverev's zesty win

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2

Stefanos Tsitsipas was fired up, as he secured his first victory in six attempts over US Open finalist Daniil Medvedev.

Top Photos Nov 11:
Tsitsipas soars;
Zverev's zesty win

Top Photos Nov 11: Tsitsipas soars; Zverev's zesty win

Getty Images

3

Greek fans displayed their passion for Tsitsipas, who, like Medvedev, was making his debut at the season-ending event.

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Top Photos Nov 11:
Tsitsipas soars;
Zverev's zesty win

Top Photos Nov 11: Tsitsipas soars; Zverev's zesty win

Getty Images

4

Pierre-Hugues Herbert and Nicolas Mahut found themselves down a break in both sets before rallying to defeat Juan Sebastian Cabal and Robert Farah, 6-3, 7-5.

Top Photos Nov 11:
Tsitsipas soars;
Zverev's zesty win

Top Photos Nov 11: Tsitsipas soars; Zverev's zesty win

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Getty Images

5

Nadal's bid for his first ATP Finals title just got a little more difficult after his opening loss.

Top Photos Nov 11:
Tsitsipas soars;
Zverev's zesty win

Top Photos Nov 11: Tsitsipas soars; Zverev's zesty win

Top Photos Nov 11:
Tsitsipas soars;
Zverev's zesty win

Top Photos Nov 11: Tsitsipas soars; Zverev's zesty win