Patch 1.01 is highly revered because it served as the baseline requirement for the legendary FIFA 11 modding scene. Iconic community expansions like the Creation Master 11 and various patch updates (which added updated rosters, faces, and tournaments years after EA abandoned the game) require a fully patched v1.01 game executable to function without crashing.
Released on October 28, 2010 Patch 1.01 was a critical performance and stability update primarily targeting the PC version of the game fifa 11 patch 1.01