The game is a bug ridden mess - broken AI, broken career mode. While the player models are decent the graphics overall are so outdated. Most importantly the gameplay itself stinks, it's horrendous actually and comes no where near resembling the sport of tennis.
Big Ant Studios continuously update the game only to break it even more. It's actually amazing how incompetent these Australian developers are. Big Ant's CEO is absolutely clueless as too what makes a good sporting game. Don't waste your money.
Edit: Typical Big Ant have already abandoned the game. Like they do with every other game they release!