Error 1049 - Unknown Database

<!doctype HTML>
<head>

  <title>Soccer.db | The Ultimate Database for Soccer Stats, Info, & News</title>

  <link rel="stylesheet" href="football.css" />

</head>
<body>

  <?php

  $host = "localhost";
  $username = "root";
  $password = "root";
  $db = "soccer_db";

  $db_con = new mysqli($host, $username, $password, $db);

  if ($db_con->connect_errno) {
    echo "Failed to connecto to MySQL: (" . $db_con->connect_errno . ") " . $db_con->connect_error;
  }
  echo $db_con->host_info . "\n";

  $result = mysqli_query($db_con, "SELECT * FROM players");

  $db_con->close();

  ?>
<div class="top-nav-wrapper">
  <div class="top-nav-content">
    <span>Soccer.db</span>
  </div>
</div>
<div class="long-ad-wrapper">
  <div class="long-ad-content">

  </div>
</div>
<?php

 echo "<table>";

 while($row = mysqli_fetch_array($result)){
   echo "<tr><td>" . $row['firstname'] . "</td><td>" . $row['lastname'] . "</td><td>" . $row['age'] . "</td></tr>";

 echo "</table>";
 }
?>
</body>