The title says it all -- no other tennis game is even remotely close to capturing the sport the way Top Spin 3 does.
The gameplay is phenomenal. There are minor flaws (the computer is far too good at serving out wide and at the net), but it feels like real tennis rather than glorified ping pong. There's strategy, timing, and, for maybe the first time ever in a tennis game, actual unforced errors on a fairly regular basis. Playing on clay feels different from playing on grass, and they both feel different from hard courts. It's one of the best sports games (yes, of ANY sport) I've ever played in terms of being a realistic, accurate simulation of the real thing.
The only major negative to this game is the career mode. The set up is okay, but all you can really do is play tournaments. There's nothing else to do -- no hiring and firing coaches, no training sessions, no sponsorships, nothing. I assume it's because they overhauled the gameplay, and they'll fix the career mode in Top Spin 4, but it's pretty bare bones as is.
However, the gameplay is so great that the career mode is still fun, and the online World Tour/online tournaments help make up for the lack of options in the career.
If you want the best tennis sim ever made, play this game. If you want arcade tennis (just mindlessly whacking it back and forth), check out Virtua Tennis.
I've played video games along time and this is one of the worse sports games I've played in about 10+ years. Get the tennis games made by Sega for PS2 or PS3, you'll be glad you did. Those games play much smoothly. This game is one of the worse tennis games I've ever played and these games for tennis are very limited, however this is the worse out of the worse.