Argentine tennis player David Nalbandian has reportedly announced his retirement from professional tennis due to a shoulder injury.
The Argentina ace beat his compatriot to earn his first victory at the season-ending Masters Cup.
The second seeded Federer will take on Juan Carlos Ferrero in the semi-finals of the Australian Open.
David Nalbandian made his Australian Open credentials clear to all concerned on Saturday by swiping the Sydney International title.
Third seed David Nalbandian recovered from a shocking start to beat Argentine compatriot Agustin Calleri 1-6, 7-6, 6-3 on Tuesday and become the first man into the third round of the Barcelona Open.
Roger Federer beat Ivan Ljubicic 7-6, 6-4 to bring David Nalbandian through with him.
Fifth seed Gonzalez next faces Andy Roddick atthe Vienna Open.
Argentina's David Nalbandian was defaulted from his Queen's Club final against Croatia's Marin Cilic on Sunday for kicking out and injuring a linesman.
Spain's Nicolas Almagro hammered top seed David Nalbandian 6-1, 7-6 (7-1) to win the Acapulco International tournament, ending the Argentine's 10-match unbeaten run.
David Nalbandian held his nerve to beat Swede Robin Soderling 6-2, 5-7, 6-3 on Sunday and win the Stockholm Open.
Madrid Masters winner David Nalbandian suffered a shock first round defeat at the Basel ATP event.
The Argentine suffered a shock straight-sets defeat by Peru's Luis Horna in the round-robin stage at the Buenos Aires Open.
The fourth seed registered an emphatic 7-5, 6-0, 6-0 victory over unseeded Frenchman Fabrice Santoro.
David Nalbandian survived a testing encounter with Stanislas Wawrinka to prevail 6-4, 3-6, 6-4, 6-2
David Nalbandian shocked Roger Federer 6-7, 6-7, 6-2, 6-1, 7-6 to win the Masters Cup
World number one Rafael Nadal was handed a place in the last four of the Barcelona Open on Thursday after David Nalbandian was forced to withdraw from their quarter-final clash with a hip injury. The Spaniard earlier thrashed unseeded Belgian Christophe Rochus 6-2 6-0 and was due to play seventh-seeded Nalbandian in the last eight on Friday as he bids for a fifth straight title.
Argentina's David Nalbandian joined the list of top seeds knocked out of the Australian Open third round when he suffered a 6-1, 6-2, 6-3 loss at the hands of former world number one Juan Carlos Ferrero on Sunday. Lleyton Hewitt floored 15th seed Marcos Baghdatis 4-6, 7-5, 7-5, 6-7, 6-3 in the latest finish of a singles match in Grand Slam history on Friday night.
Top seed David Nalbandian was knocked out of the first round of the Acapulco Open late on Tuesday, losing 1-6, 6-3, 6-4 to unseeded Austrian Daniel Koellerer. Nalbandian swept through the first set in 31 minutes but fell to pieces after that, producing a string of unforced errors as 116th ranked Koellerer charged into the second round.
David Nalbandian won his delayed singles match and then teamed up with Mariano Puerta to win the doubles.
The Argentine beat Andre Pavel 6-4, 6-1 victory in Sunday's final to win the Munich Open.
Top seed David Ferrer will meet former world number three David Nalbandian in the final of the Auckland Open after they both advanced with easy semi-final victories on Friday.
Unseeded Argentine David Nalbandian inflicted a shock 6-1, 6-2 defeat on world number two Rafael Nadal in the Madrid Masters on Friday to earn a semi-final showdown with young Serb Novak Djokovic.
Former finalist David Nalbandian became the highest men's seed to perish at Wimbledon on Monday, beaten 6-4, 6-2, 6-4 by Canada's Frank Dancevic.
David Nalbandian beat world number three Novak Djokovic 6-4, 7-6 to enter his first final of the year.
David Nalbandian lost 6-1, 6-2 to Italian Davide Sanguinetti in the first round of Toronto Masters.
David Nalbandian thrashed Ivan Ljubicic 6-2, 6-2 to reach the semi-finals of the Masters Cup
Spain's Rafa Nadal faces the first real test of his title defence when he takes on David Nalbandian of Argentina at the US Open on Sunday.
Australian Open champion Novak Djokovic beat Belgium's Steve Darcis 6-4, 6-0 in the second round of the Rome Masters on Wednesday, while top-10 seeds David Nalbandian and David Ferrer were knocked out.
David Nalbandian has confirmed his participation for the 2007 Chennai Open.
He said that experience had taught him how to handle "an incredibly good baseliner" like Nalbandian.
Nalbandian's spectacular performance in the Davis Cup final against Russia over the weekend suggests that he is ready to challenge the tennis elite.
The world number one registered a crushing 6-4, 6-0 victory in the semi-finals of the Madrid Masters.
The Argentine was stretched to five sets by Thai qualifier Danai Udomchoke.
Former Wimbledon finalist David Nalbandian made the most of his first tournament since April by turning aside eighth seed Marcos Baghdatis 6-2, 7-6 to win the $1.2 million Washington Classic on Sunday.
Rafa Nadal kept alive his chances of ending his 11 month title drought by taming tenacious Argentine David Nalbandian 6-7, 6-2, 6-2 in the third round of the Sony Ericsson Open on Sunday.