Wonder if PC1 or others remember anything about a long game that Connors and Laver played in their Challenge Match in '75. It was reported as 22 points, or 8 deuces. It was Laver serving at 4-5 in the fourth set, and he finally held after saving 5 match points.
I don't know if there's any surviving footage of that game and I've never seen it. My highlights of the match end in the middle of the fourth set: http://www.youtube.com/watch?v=SptdffCeVmM