There have been suggestions that athletes may be forced to quarantine ahead of the delayed Tokyo Olympics which could prove problematic for cyclists in particular.
The road race in Tokyo will take place less than a week after the Tour de France concludes in Paris.
“We will see what’s going to happen this year. I cannot decide, we don’t know yet,” said Sagan, speaking from a Bora-Hansgrohe team training camp in Italy.
“But if I have to choose . . . for sure I will go for (the Tour de France) green jersey again.”
Sagan has won a record seven Tour de France green jerseys. His triumphs came from 2012 to 2016 and again in 2018 and 2019.
The green jersey is awarded annually to the winner of the points classification.
Sagan failed to secure a hat-trick of green jersey wins on the Champs-Elysees in Paris in 2020, giving the 30-year-old extra motivation to reclaim the jersey in 2021.
Last year’s green jersey went to Ireland’s Sam Bennett.
Sagan, who will turn 31 on January 26, is one of the most gifted riders of his generation.
Among his numerous victories around the world are three consecutive world championship road race titles from 2015 to 2017.