Was Sampras the greatest ever?

Pete Sampras walked away from tennis on Monday.

Also Read Tributes and tears as Sampras says goodbye

The winner of a record 14 Grand Slam titles said the competitive juices that drove him to 64 titles and allowed him to amass more than $43 million in prize money no longer flowed (See photo feature: Pistol Pete).

Do you think Sampras was the greatest tennis player ever?