CANBERRA, Jan. 22 (Xinhuanet) -- Fourth seed David Nalbandian, seventh seed Ivan Ljubicic, unseeded players Marcos Baghdatis and Fabrice Santoro made it through to the men's singles last eight at the Autralian Open in Melbourne, while second seed Andy Roddick, former Open champion Thomas Johansson joined the exodus of seeds.     

Andy Roddick of the U.S. reacts after missing a shot during his match against Marcos Baghdatis of Cyprus at the Australian Open tennis tournament in Melbourne January 22, 2006.(Xinhua/Reuters)

    In the Open's greatest upset, Roddick lost in four sets in the fourth round showdown with Marcos Baghdatis of Cyprus.

    Baghdatis's victory of 6-4, 1-6, 6-3 and 6-4 came in front of a crowd that gave him almost overwhelming support, after the Cypriot overcame a second-set glitch.

    Baghdatis said he had played one of the best matches of his career.

    Roddick had been considered the only player likely to challenge world No. 1 Roger Federer for the Open title. But the world No. 2 performed well below par in Sunday's match.

    In the vital fifth game of the fourth set, Roddick served to stay in touch, only to surrender every point, the last of them with a double fault.

    Despite his consistently high ranking, Roddick has won only one grand slam title, the 2003 US Open.

    

David Nalbandian of Argentina serves to Tommy Robredo of Spain at the Australian Open tennis tournament in Melbourne January 22, 2006. (Xinhua/Reuters)

    Nalbandian of Argentina dispatched 16th seed Tommy Robredo of Spain 6-3, 6-0, 2-6 and 6-2 and will play Fabrice Santoro in the quarter final.

    The fourth seed is the form player at the bottom half of the draw, coming into the Open with a last-start victory in the year-ending Master Cup in Shanghai, China, in last November.

    Santoro made his first grand slam quarter final after 17 years of trying, by beating 11th seed David Ferrer of Spain 6-4, 7-5 and 7-5.
  

Marcos Baghdatis of Cyprus jubilates after winning his fourth round match against Andy Roddick of the United States at the Australian Open Tennis Tournament in Melbourne, Australia, Sunday, Jan 22, 2006. Baghdatis upset Roddick 6-4, 1-6, 6-3, 6-4. (Xinhua/Reuters)

    Baghdatis's quarter final opponent will be seventh seed Ivan Ljubicic of Croatia, who bowled over Johansson 6-2, 6-4 and 6-4 in less than two hours.

    It took Ljubicic into the quarter-finals of a grand slam tournament for the first time in his career. He hasn't dropped a set in the tournament so far.

    Johansson's exit from the tournament left world No.1 Roger Federer, who won this event in 2004, as the only former Open champion still in the men's draw. Enditem