Earlier I wrote that the last duel was in France in 1967. It was between Rene Ribiere and the insulted party Gaston Defferre and was to first blood The first hit to Rene Ribiere was rejected by Gaston Defferre. They continued, until Ribiere was hit a second time. I can't find anything about how he was injured, but I'm assuming it was nothing serious.
You can see how they're just circling the guard, looking for an exposed wrist, which does make sense. If your only object is to draw blood, why do anything more?