I totally agree with most folks here about round-robin just being as confusing as heck to understand from a draw perspective. But I have to say, it's added a pretty exciting dimension to what would otherwise be a fairly run-of-the-mill early round match at Las Vegas. Without spoiling anything, here's the deal: Blake is playing Del Potro. In order for Blake to progress to the quarters, he has to win in straights without losing more than 5 games. Conversely, all Del Potro has to do is win 6 games in this match. It definitely adds different pressures to the match. And every game is more tense to watch with this added pressure.