To people who have trouble with this film:

It’s simple and not overly complex, so there’s the good news.

It’s a film about individual perspective. Seeing what you want to see e.t.c. And cinema is just that. Like the shower scene in Pyscho for example. Basically, it’s a study of the power of the camera with a human perspective.
The final scene with the tennis game is the point exactly. We see a tennis game being acted out – without actually seeing a ball. The camera remains static and motionless. Then, suddenly, we start to ‘see’ a ball – but only when the camera tells us so – by moving in a handheld way. Another interesting point to raise here is the scene just after Thomas has gone back to the park – this time at night – to see if there is actually a dead body. He finds one. Then he goes to the party to find his agent. Why? Because our individual perspectives require confirmation to validate our reality. And when he returns, the body has gone…

So, who has the power there? Are we all just an illusion to the camera? Hence, the final dissolve of the main character at the end. Antonioni was a true master of film, not as a medium, but as a langauge – much like Wong Kar-Wai. So don’t watch this film looking for a story. Simply watch it as images and sound and then go for a walk, alone through a park.