Stage 4 was a day of long range attacks, and of a victory decided by millimetres.
At flagdrop, a veteran of 816 breakaway kilometres in 2019, Marco Frapporti (THR), set off on his marauding way with Kamil Gradek (CCC) and Simon Pellaud (ANS). After 48 km they led by 4’08”, as Arnaud Démare’s Groupama-FDJ team monitored the gap from the front of the peloton.