multiple loops more categories

hi… i have tow loops working… but into the small one i need 2 or more categories.. right now the code is

<?php
$my_query = new WP_Query(‘category_name=Sport&showposts=10’);

if( $my_query->have_posts() ) : ?>

• <h2>Altri articoli</h2>
  <ul class=”bor”>

  <?

  while ($my_query->have_posts()) : $my_query->the_post();

  ?>

  <li id=”post-<?php the_ID(); ?>“>” rel=”bookmark” title=”Permanent Link to <?php the_title(); ?>“><?php the_title(); ?> <?php the_excerpt_reloaded(0, ”, ‘none’, TRUE, ‘>>>’, FALSE, 2); ?>

<?php endwhile; ?>

<?php endif; ?>

i need to add another category to the query but i’m getting only errors

$my_query = new WP_Query(‘category_name=Sport AND ANOTHER CATEGORY HERE&showposts=10’);

how i can fo that?