Stock car racing

Stock car racing is organized into stages in the API. In order to get to know all the stages, it is possible to filter "All available tournament for a sport" with sport id = 191 as shown below.

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  <sport_tournaments xmlns="http://schemas.sportradar.com/sportsapi/v1/unified" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" generated_at="2021-10-28T08:57:36+00:00" 
xsi:schemaLocation="http://schemas.sportradar.com/sportsapi/v1/unified http://schemas.sportradar.com/ufsportsapi/v1/endpoints/unified/ufsportsapi.xsd">
    <sport id="sr:sport:191" name="Stock Car Racing"/>
    <tournaments>
      <tournament id="sr:stage:554491" name="Nascar Cup Series 2020" scheduled="2020-02-16T19:30:00+00:00" scheduled_end="2020-11-09T00:00:00+00:00">
        <sport id="sr:sport:191" name="Stock Car Racing"/>
        <category id="sr:category:150" name="Nascar"/>
      </tournament>
      <tournament id="sr:stage:602671" name="Nascar Camping World Truck Series 2020" scheduled="2020-02-14T05:00:00+00:00" scheduled_end="2020-11-07T23:00:00+00:00">
        <sport id="sr:sport:191" name="Stock Car Racing"/>
        <category id="sr:category:150" name="Nascar"/>
      </tournament>
      <tournament id="sr:stage:602675" name="Nascar Xfinity Series_2020" scheduled="2020-02-15T00:00:00+00:00" scheduled_end="2020-11-08T00:00:00+00:00">
        <sport id="sr:sport:191" name="Stock Car Racing"/>
        <category id="sr:category:150" name="Nascar"/>
      </tournament>
      <tournament id="sr:stage:604041" name="Nascar Camping World Truck Series_2020" scheduled="2020-02-14T00:00:00+00:00" scheduled_end="2020-12-31T00:00:00+00:00">
        <sport id="sr:sport:191" name="Stock Car Racing"/>
        <category id="sr:category:150" name="Nascar"/>
      </tournament>
      <tournament id="sr:stage:644616" name="Nascar Cup Series 2021" scheduled="2021-02-14T19:30:00+00:00" scheduled_end="2021-11-08T23:55:00+00:00">
        <sport id="sr:sport:191" name="Stock Car Racing"/>
        <category id="sr:category:150" name="Nascar"/>
      </tournament>
      <tournament id="sr:stage:694462" name="Nascar Camping World Truck Series 2021" scheduled="2021-02-12T00:00:00+00:00" scheduled_end="2021-11-05T23:55:00+00:00">
        <sport id="sr:sport:191" name="Stock Car Racing"/>
        <category id="sr:category:150" name="Nascar"/>
      </tournament>
      <tournament id="sr:stage:694508" name="Nascar Xfinity Series 2021" scheduled="2021-02-13T00:00:00+00:00" scheduled_end="2021-11-07T23:00:00+00:00">
        <sport id="sr:sport:191" name="Stock Car Racing"/>
        <category id="sr:category:150" name="Nascar"/>
      </tournament>
    </tournaments>
  </sport_tournaments>

To get to know better every stage it is possible to filter those into the summary, fixture or tournaments end points filtering by stage id.