Ace Gerrard rocks Reds with shock quit threat

STEVEN GERRARD has rocked England by insisting next summer&rsquo;s World Cup could be his last after admitting he could retire in 2013.<br /><br />The Liverpool captain will be 33 at the end of his current contract, when he says he wants to call time on his illustrious career as a one-club man.<br /><br />Midfielder Gerrard also admitted he twice thought about leaving Liverpool, particularly when tempted by Chelsea in 2005, but insists his future remains with the Anfield club. <br /><br />&ldquo;I will be 33 at the end of my contract in 2013 and I don&rsquo;t know if I will go any further,&rdquo; Gerrard admitted. &ldquo;If I do retire, then I will know that from the start to the end of my career I only had one club. And I don&rsquo;t want to think about wearing any other shirt in the future.<br /><br />&ldquo;I was close to leaving in the past, maybe twice, most notably in 2005. That year we were a long way off the Premier League title and Chelsea&rsquo;s interest turned my head. It was a difficult moment for me. However, now when I look back I am very happy that I chose to stay here. It has given me real pride.&rdquo;<br /><br />Meanwhile Liverpool are favourites to sign Portsmouth and England defender Glen Johnson. The Reds are reported to have had a &pound;17m offer accepted for the right-back, who has also attracted interest from Chelsea and Manchester City.