Hi, 

 I am sorry but I have to tell you I had to undo every revision to Tennis records of the Open Era - Men's Singles that you did. You can see all the details in the History of the page. 

 They are either incorrect or inconsistent: you update "Matches won" number but you do not update "Matches played" which is immediately left to it, and you do not update "Match winning" percentage which is immediately to the right. 

 You update a number but then you do not rearrange the list, which is obviously sorted. 

 You update Year-End Ranking Streaks and delete Stephan Edberg's records, and furthermore you update it to 2012 but still leave the note "as of end 2011". 

 If you need help on how to do something please consult some of the other editors. 

 I hope you read this.