Former world champion Sagan and Van Aert butted heads during last year’s Tour after Sagan used his head and shoulder to shove his Jumbo-Visma rival in the sprint finish.
After the finish, Sagan was relegated to last place in the peloton after initially finishing second on the stage, while Van Aert was also handed a fine for “inappropriate behaviour” after raising his middle finger at Sagan.
“Such situations happen in bunch sprints. Everyone knows how hectic things can get.
“After what he said to me in that sprint, I think he should apologise. I thought that five months ago and still do now. Well, I won’t lose my sleep over it.”
The incident happened on stage 11 of last year’s Tour during a bunch finish in Poitiers.
Sagan was relegated after the sprint finish in Poitiers after he used his head and shoulder to shove Van Aert 50 metres from the line.
The Slovakian, who had finished second on the stage, was pushed back to last place in the peloton, received a fine and was handed a 13 point penalty in the sprints classification by the commissiares.
But the officials also handed a punishment to Jumbo-Visma rider Van Aert, after he made a gesture towards Sagan as the riders crossed the finish line.
After the stage, pictures emerged of Van Aert raising his middle finger to Sagan as he vented his frustration about the incident. You can see the picture on Twitter via Flamme Rouge here.
Van Aert was fined 200CHF (£169) for his reaction, while Sagan was stripped of his second place finish, fined 500CHF (£422) and had 13 points deducted in the green jersey race.
Speaking after the stage, Van Aert said he tried to speak to Sagan but only received “strong words” in response.