Former world number ones Lleyton Hewitt and Jennifer Capriati were also shown the exit door in the Nasdaq 100 Open.\n\n
The world number two was forced to hobble away from her Hopman Cup match against Alicia Molik.
Australia beat Croatia 2-1 on Friday in Malaga, Spain, to reach the Davis Cup final for the first time in 19 years and will next face either Canada or Italy.
The 16th seeded Cypriot was a comfortable winner over Dane Kristian Pless while Sharapova proved too good for American Jill Craybas.
With the shock early exit of Hewitt and Agassi none of them has ever passed the semi-finals at Wimbledon.
The 2.08-metre qualifier earned the applause of a tightly packed crowd squashed on to benches round court number 14.
The 33-year-old's win over Xavier Malisse in the Stella Artois Championships vaulted him to the top.
Robredo joins compatriots Carlos Moya, Juan Carlos Ferrero and his next opponent, holder Albert Costa, in the last eight.
The tenth seed was beaten by Slovenia's Tina Pisnik in the second round at the French Open.
Davis Cup champions Britain were locked at 1-1 with Japan after the opening two singles of their World Group, first-round tie on Friday after Andy Murray gave the hosts the lead.
Andre Agassi outlasted unseeded American Robby Ginepri to reach his sixth U.S. Open final and become the oldest man to reach a Grand Slam final in 31 years.
Andu Roddick beat Radek Stepanek 6-3, 2-6, 6-2 to enter the third successive final at Queen's.
List of Wimbledon men's singles champions since 1922.
Manila Maverics wrapped up their International Premier Tennis League campaign in style, winning all five matches in their 30-15 victory over Singapore Slammers, in Dubai.
Mirnyi will now play Swede Jonas Bjorkman in the fourth round on Monday.\n\n
From ladies fashion hats, fresh floral hats and crazy headpieces - Melbourne Cup, saw it all.
Italy returned to the Davis Cup final after a gap of 25 years as Jannik Sinner beat Novak Djokovic in both singles and doubles to secure a 2-1 victory over Serbia on Saturday that earned the 1976 champions a title clash with Australia.
India's top singles player Prajnesh Gunnesaran drew world number 17 Milos Raonic of Canada as his first round opponent at the Wimbledon Championships, starting Monday.
Roger Federer, who will be chasing an 18th Grand Slam title at the Australian Open later this month, breezed through to the Brisbane International men's semi-finals with a 6-1, 6-1 thumping of Australian Marinko Matosevic.
Three-times Grand Slam winner Murray has struggled to regain form since undergoing hip surgery last January and was knocked out in the first round of the Australian Open on Monday having said the tournament could be his last as a professional.
The 20-year-old Spaniard will attempt to end Djokovic's 34-match winning run on the Wimbledon grass.
Top seed Agnieszka Radwanska's title defence at the Sydney International lasted just 92 minutes when she was dumped out of the second round by Bethanie Mattek-Sands on Tuesday.
Serena faces hard-hitting Giorgi in first round while former World No Hewitt play his final grand slam
Rediff.com has the best sports images from the events in the week gone by snapped right here...
Hewitt defers Hall of Fame induction due to travel restrictions
His idol, Sachin Tendulkar, is often photographed with Roger Federer at Wimbledon. On Monday, it was the turn of Virat Kohli, India's latest batting sensation, to meet the Swiss tennis legend.
A look at the 10 landmark matches from the 20-times Grand Slam champion's career.
Kazahk Bublik powers past Zverev in straight sets to reach Halle final
Nick Kyrgios eased past John Isner 7-5, 7-6(5), 7-6(5) in a duel of big servers to fire Australia to a 2-0 lead over the United States in their Davis Cup quarter-final in Brisbane on Friday.
Novak Djokovic deserves a "little star" next to his name for a spectacular 2015 season that saw him win three grand slams among his 11 titles but the men's game is not simply a matter of the Serb versus the rest, Roger Federer said.
Argentine tennis player David Nalbandian has reportedly announced his retirement from professional tennis due to a shoulder injury.
Despite the world number nine's withdrawal, a strong field is expected for the event, including Roger Federer, Kei Nishikori, Milos Raonic, Grigor Dimitrov and Juan Martin del Potro, who have all confirmed their participation.