Roger Federer of Switzerland celebrates a point against Juan Martin Del Potro of Argentina in the Semifinal of Men's Singles Tennis on Day 7 of the London 2012 Olympic Games at Wimbledon on August 3, 2012 in London, England. Federer defeated Del Potro 4-6, 7-6, 19-17.
Roger Federer of Switzerland celebrates a point against Juan Martin Del Potro of Argentina in the Semifinal of Men's Singles Tennis on Day 7 of the London 2012 Olympic Games at Wimbledon on August 3, 2012 in London, England. Federer defeated Del Potro 4-6, 7-6, 19-17. Clive Brunskill - Getty Images

Federer prevails in marathon semi

ROGER Federer is one win away from filling the last space in his trophy cabinet after beating Argentine Juan Martin del Potro in a four-and-a-half-hour epic to reach the Olympic men's singles final at Wimbledon.

The 30-year-old Swiss, who added a 17th grand slam title to his collection last month on the same Centre Court, survived a record-breaking scrap to win 3-6, 7-6, 19-17 in the longest men's three-set match played in the professional era.

The third set alone took 163 minutes with Federer, who served for the match at 10-9 but was broken to love, claiming victory when his exhausted opponent fired an attempted backhand pass into the net.

Federer won doubles gold in Beijing four years ago with Stanislas Wawrinka but had never reached an Olympics singles final.

He will face either world number two Novak Djokovic from Serbia or Britain's Andy Murray, whom he beat to win a seventh Wimbledon singles title, on Day Nine.

Read more at ABC news online.



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