It depends on if you consider it a restrictive clause. If yes, you don't need a comma here.
Basically, a restrictive relative clause contains information that’s essential to the meaning of the sentence as a whole. If you left it out, the sentence wouldn’t make much sense.
I don't think this applies because you also mention the title, so the place and time is additional information.
The perfect tense is technically incorrect because it has not taken place yet. So you could use ", which will be held at..." instead. Note that this distinguishes the date and place as supporting information instead of the main information even more and makes one wonder why it made it into the headline.
For the sake of brevity however, I think your version would also be ok.