Nominees for Fewest errors compared to winners on both sides, fewest DF compared to aces service winners and highest first serve percentages etc. The one I heard about was the 87 semi Navratilova vs Evert. Certainly the best played by both of their rivalry per the numbers. Have it on DVD the stats on the first two stats were incredibly clean. Can't remember the exact stats on hand but there was a cumulative both player total ratio of almost 3-1 winners to errors with both over 75% average first serves. Trust me play did not deteriorate much in the third set either.