Complex sentence: Having played just one Test innings, Ganteaume was left with a Test batting average of 112, which is higher than that of Donald Bradman, who has the highest average of those to play more than 20 innings in a Test career.
Split into simpler sentences: Having played just one Test innings, Ganteaume was left with a Test batting average of 112. This is higher than that of Donald Bradman, who has the highest average of those to play more than 20 innings in a Test career.