Sampras on the mental dynamic of Federer’s matches against Nadal: “It seems Roger gets a little discouraged if what he’s trying isn’t working. It seems like he starts to press a little bit, starts to miss a little bit. Rafa’s one of those players that, his level will stay the same the whole match, he just plays one speed, one way. If Roger plays really well, I think he beats Rafa; I think if he plays pretty well, I think Rafa beats him. I just think, you can’t take any time off against Rafa.
“You can’t lose your composure, you can’t be frustrated, because the next thing you know you’ll be down break point. Roger’s game is suited against Rafa because he flattens it out, he is willing to come in, he mixes it up, changes the speed and I think, it just seems like if there’s a five-minute span in the match, Rafa’s going to be right there and Roger can get a little bit down, you can sort of dig yourself a bit of a hole.
I’ve seen that happen a little bit. But listen, I am a huge fan of those two guys, and it’s a pleasure watching them play.”
sorry I'm not a good English user, what the meaning of "dig himself a hole"? He already have has a one ,why should he dig another?sounds porny