What is your all time favorite match? 1981 Wimbledon Men's Final for me. My guy broke a 5 consecutive Wimbledon titles streak and finally beat kihei's android to win Wimbledon.
I saw "my android" come of age at the Canadian Open in 1973. That was really special. Up and coming Borg, just barely 17-years-old, had worked himself into the top 40, oozing massive potential, but had yet to make a really big splash against a top player. In the round of 16, he ran up against the ultra-dangerous 38-year-old Ken Rosewall, still #6 in the world, who won the Australian Open the previous year and was a Wimbledon finalist the next year. It was the only match that these two legends played against each other. Borg lost the first set 2-6 as Rosewall schooled him, but then quick learner Bjorn won the next two sets 6-1 and 7-5. The quality of tennis in the third set was brilliant on both sides, with most games going to deuce and numerous break points being saved by both players. That was the most memorable match I ever witnessed live, and also quite likely the best played single set.
Favourite matches that I saw on TV would include several contenders:
Rafa over Roger at Wimbledon in 2008 (tweedle dee)
Roger over Rafa at Wimbledon in 2007 (tweedle dum)
Roger over Rafa at the Australian Open in 2016 (best fifth set comeback that I have ever seen)
Borg over McEnroe at Wimbledon in 1980 (the match that included the epic 18-16 fourth set tie breaker which Borg actually lost, only to win 8-6 in the fifth having surrendered only 3 points on serve in the set)
Ilie Nastase over Arthur Ashe in the US Open in 1972 (Ilie the Artist)
Arthur Ashe over Jimmy Connors at Wimbledon in 1975 (Greatest strategical win that I have ever seen, bar none)
But my favourite tennis match would be:
Marat Safin over Roger in five superb sets in the semifinals of the Australian Open in 2005 (just an incredibly high level of play and a wonderfully suspenseful match between two gifted players)