<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?uamuzi wa serena williams kwamba amefadhaishwa na uchezaji wake katika msimu wa mwaka 2013 unaonesha nia ya mchezaji huyo kutaka kupita kiwango cha mataji 18 ya grand slam ambayo martina navratilova na chris evert wamefikia na kuwania kuifikia rekodi ya steffi graf wa ujerumani ya mataji 22.  <response>: serena williams verdict that she is a bit disappointed with her 2013 season indicates her urgency to overtake the 18 grand slam titles of martina navratilova and chris evert and to get on with chasing steffi grafs open era record of 22. 