The Bora-Hansgrohe leader is currently leading the maglia ciclamino points classification and is happy to defend his jersey, rather than battle for another stage.
Sagan is currently battling Davide Cimolai and Fernando Gaviria for the points classification, as he has a 23-point margin with just three stages left to race.
Speaking after stage 18, a day that would have suited a versatile sprinter like Sagan, he said: “It went pretty well for us. With the jersey it was our goal to control the race from the start and make sure Gaviria and Cimolai didn’t go for the break. That’s it for the day for us. Now I’d prefer to keep the jersey than fight for another stage.
“It doesn’t make sense for me to go for the breakaway, because if I did Gaviria and Cimolai would go with me. It depends on what goals you have, but I have the ciclamino jersey as a goal.”
Sagan currently sits on 135 points in the competition, having won stage 10 into Foligno ahead of both Gaviria (UAE Team Emirates) and Cimolai (Israel Start-Up Nation).
With no more sprint opportunities remaining in the race, Sagan now has to defend his jersey using intermediate sprint points during the stages, ensuring his rivals can’t get up the road in a break to secure maximum points without him.
Stage 18 would have been well-suited to Sagan, with a quick succession of hills falling in the final 40km, but instead the breakaway were allowed to go 20 minutes clear of the peloton, with Alberto Bettiol (EF Education-Nippo) winning the stage.
Cimolai is now Sagan's nearest rival on 113 points, followed by Gaviria at 110.
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