A compare on how Sampras's serve compares to Federer's. Federer serving … Sampras serving … Federer was full of praise for Sampras, saying he had lost little from his trademark serve."I am really, really impressed by the way he's been playing," said the Swiss."He's got the most incredible serve, you know. I can't read it, he serves it to the line, he serves harder than me." Presence of the King & Deputy Prime Minister of Malaysia in the grandstand.