Grand slams no longer just for the top two, says Cash

FORMER Wimbledon champion Pat Cash believes Juan Martin del Potro&rsquo;s shock US Open success is a sign that Roger Federer and Rafael Nadal&rsquo;s grand slam stranglehold is slipping.<br /><br />Before this year&rsquo;s visit to Flushing Meadows, Federer and Nadal had enjoyed a near monopoly at the slams, winning 17 of the previous 18 events. <br /><br />But 20-year-old Del Potro beat them both on his way to landing his first major title earlier this week, and Cash says he is just one of a host of players ready to challenge the old order. &ldquo;I think Nadal and Federer are still the best but this guy Del Potro is only going to get better,&rdquo; Cash told City A.M. &ldquo;He&rsquo;s going to be around for a while and as long as he doesn&rsquo;t get injured he&rsquo;s going to be a threat.<br /><br />&ldquo;And I think that&rsquo;s a good thing for tennis. It&rsquo;s been a one or two-man show for too long. But with Andy Murray, Novak Djokovic, this guy and maybe Jo-Wilfried Tsonga, there is going to be real interest. <br /><br />&ldquo;It&rsquo;s a real opportunity for other players to get grand slams. Other players are catching up.&rdquo;<br /><br />Those players are all set to clash at the end-of-season Barclays ATP World Tour Finals at London&rsquo;s O2 in November, for which Cash is an ambassador. <br /><br />Home interest will be focused on British No1 Murray, who suffered a disappointing fourth-round exit at the US Open.<br /><br />The Scottish world No3 is now the only player in the top six still searching for a maiden grand slam title &ndash; not that Cash thinks it will bother him.<br /><br />&ldquo;I don&rsquo;t think he really cares, as long as he keeps improving,&rdquo; said the Australian, who now works as a pundit. <br /><br />&ldquo;And I think he will win grand slam. I&rsquo;d be surprised if he didn&rsquo;t get to a grand slam final next year.&rdquo;<br />