Roger is no longer as quick or explosive as he was at age 24 or 26. If he was, he would still beat these guys.
The greatest ever is not a matter of personal opinion. It's a matter of FACTS. 17 grand slams, 80 titles, 7 GS finals, 35 consecutive GS with a quarterfinal or better. Multiple Masters victories.
Final proof??? Guess who both Sampras and McEnroe consider the best ever????? That would be Roger.