Both are classy tennis players; Ranked No. 1 in the World for so many years; for Sampras 6 consecutive years and Federer for 4 and a half years, and still would be able to regain the No. 1 spot which he would be replaced by Rafa Nadal, but hopefully not for long, (no offense to Rafa, who himself is a great player)) :No French open titles for both-maybe Federer will accomplish this before he retires; and most important of all they both have their birthdays in the same month- August- Federer celebrates his every 8th of August and Sampras- the 12th of August.That is the most important similarity- they were God-sent to us for us to enjoy this very classy sport-TENNIS. Significance of this similarities- both players have the same birth month as my mom and dad. My mom-same as Pete's birthday- You add Pete's and Roger's birthday-12 + 8=20 which is my dad's birthday.