As far as I know there is no defensive skill trained with 1-on-1. Or maybe I was just unlucky all the years.
Imo it makes no sense to train 1-on-1 for guards, as the free IS that comes along with Forward Training outweighs the slightly better JS training for guards.
Größter Knecht aller Zeiten aka His Excellency aka President for Life aka Field Marshal Al Hadji aka Lord of All the Beasts of the Earth and Fishes of the Seas aka aka Conqueror of the Buzzerbeater Empire in Europe in General and Austria in Particular