"There is no doubt he (Jayasuriya) is a great player and we'd like to get on top of him early and knock him over. We are just concentrating on this," said McGrath, whose side take on Sri Lanka in Grenada on Monday.
"From what we've seen, the pitch in Grenada is slower and takes some turn. It will be a big test for us, and probably suit Sri Lanka."
Australia became the first team to qualify for the semi-finals after whipping debutants Ireland by nine wickets in a Super Eights match here on Friday. They now lead the table with 10 points from five matches.
McGrath played a big role in Australia's victory, grabbing three early wickets on a lively track to help his side dismiss the Cup debutants for 91. He was named man of the match.
"It (the pitch) had a lot more bounce than the others we've played on. To me, this is what West Indies cricket is about. I grew up watching four fast bowlers on fast, bouncy wickets," said McGrath.
"There was good carry, although a few kept a bit low. We look forward to be hopefully back here for the final. Not many teams can beat us when we play well. If all goes well, I'll get four more matches and then hang the boots up."
McGrath, who has already quit Test cricket, is playing in his last World Cup.