July 2009 - Davis Cup, Israel vs. Russia
The first tennis match I saw was one of the Davis Cup quarterfinals matches between Israel and Russia. I'm not sure which one, but it was probably the doubles match between Ram/Erlich and Kunitsyn/Safin, which decided the tie and sent Israel to play semifinals against Spain(!).
I remember that Spain's tie against Germany wasn't decided at that point, and that I wished for a Germany win, so that I'd have a chance to go and see the next tie live (it could be a home tie for us). Eventually, more than a year would pass before there actually was a home tie in Israel, but my love for Davis Cup started back then.