The abbreviated 2020 season was full of the unexpected, both on and off the court, and there were results that shocked fans and players alike. Let's take a look at the Top 10 biggest upsets of 2020.

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1

Setting: Vienna Open, quarterfinals

Rankings: Sonego, No. 42 vs. Djokovic, No. 1

Score: 6-2, 6-1

Lorenzo Sonego became extremely lucky in the Vienna Open when he was granted entry as a lucky loser. He made the most of it by taking down Novak Djokovic in a stunning quarterfinal. The 25-year-old shocked the world with a 6-2, 6-1 victory, one day after the Serbian all but secured the year-end No. 1 status. He is the first lucky loser to ever beat Djokovic.

Sonego jumped out to a 4-0 lead in the first set as the Serbian to committed 13 unforced errors. This was only the third loss the Serbian suffered during the entire season, made even more incredible because Sonego had never defeated a Top-10 player.

The last time Djokovic lost to a player outside the Top 40 was the 2018 French Open against a world No. 72-ranked Marco Cecchinato.