Passage: Right-handed as both batsman and bowler, Grace dominated the sport during his career. His technical innovations and enormous influence left a lasting legacy. An outstanding all-rounder, he excelled at all the essential skills of batting, bowling and fielding, but it is for his batting that he is most renowned. He is held to have invented modern batsmanship. Usually opening the innings, he was particularly admired for his mastery of all strokes, and his level of expertise was said by contemporary reviewers to be unique. He generally captained the teams he played for at all levels because of his skill and tactical acumen.

Question: What is something that he invented?
modern batsmanship