JSFiddle - React, Tailwind, and code Playground

HTML

<h2>Participants</h2>
<table border="1">
  <tbody>
    <tr>
      <td>01</td>
      <td>Andrew</td>
    </tr>
    <tr>
      <td>02</td>
      <td>Julian</td>
    </tr>
    <tr>
      <td>03</td>
      <td>Matt</td>
    </tr>
    <tr>
      <td>04</td>
      <td>Sarah</td>
    </tr>
  </tbody>
</table>

<h2>Winners</h2>
<table border="1">
  <tbody>
    <tr>
      <td>01</td>
      <td>Andrew</td>
    </tr>
    <tr>
      <td>04</td>
      <td>Sarah</td>
    </tr>
  </tbody>
</table>

JavaScript

const result = $('table')
  .map((i, table) => {
    return $(table)
      .find('tbody tr')
      .map((j, row) => {
        const $row = $(row);

        return {
          number: $row.find('td:nth-child(1)').text(),
          name: $row.find('td:nth-child(2)').text(),
        };
      })
      .toArray(); // [1]
  })
  .toArray();

console.log(result);

// [1] Try to comment this line and look at the console.