I'm hoping that the final day is not simply a procession, albeit it is a short stage. In 1978 on the last stage into Paris:
"Before the last stage, Hinault had an advantage of more than three minutes on Zoetemelk, and almost 25 minutes on the next cyclists. Traditionally, the last stage is run at a slow pace, because the winners are already known. But Zoetemelk attacked, and Hinault chased him. Together they stayed away from the rest, and Hinault beat Zoetemelk in the sprint, winning his seventh stage of the race."
Apparently while on the road, Zoetemelk tells Hinault "OK, you've won the tour now, let me win the final sprint".
Hinault says, "No, I'm not giving you a present!". More remarkable, Cyrille Guimard get's involved too and tells
Zoetemelk "There's still 40 km to go, why should Hinault stop racing now?"