Daniil Medvedev. Andrey Rublev will compete for a third time and Casper Ruud a second.
Three of the competitors have won the year-end competition, Djokovic, Medvedev and Tsitsipas. Djokovic won in 2008 before four consecutive titles from 2012 to 2015. Tsitsipas won on his debut in 2019 while Medvedev was the 2020 champion.
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