As your XML file has a simple tabular structure, you can easily fit your data into the items/fields concepts used in Lightstreamer.
What you can associate to the concept of "item" depends on what your front-end page is aimed at representing.
Does your page explicitly mention each single match, so that you only need to decorate the match data with the current result?
Or does the page contain a table which just lists the current matches, so that new matches could even enter the table dynamically as they start?
The behavior of the page and the identification of what is a data "item" is a precondition for designing the Data Adapter.