PES 2009
50 Achievements
1,000
Xbox 360
100 Clean Sheets
A title awarded when you keep 100 clean sheets.
25
How to unlock the 100 Clean Sheets achievement in PES 2009 - Definitive Guide
A clean sheet is when you concede no goals.I don't think you can check how many clean sheets you have kept.Achievement will come when trying for 100 wins and 100 matches.Can be done on any game mode/difficulty.