this:
<?php if ($rsTeams->TotalRows == 0) { // Show if mysqli recordset empty ?>
<select name="teams" id="teams">
<option value="0">Then choose a team</option><?php } // Show if mysqli recordset empty ?>
should be:
<select name="teams" id="teams">
<?php if ($rsTeams->TotalRows == 0) { // Show if mysqli recordset empty ?>
<option value="0">Then choose a team</option><?php } // Show if mysqli recordset empty ?>