The Republican billionaire's allegations came as steps are being taken towards recounting of votes in the swing state of Wisconsin, which Trump won.
'Let's go back to work,' Acosta told reporters after the US District court reinstated his White House press credentials.
The billionaire from New York, who continually claimed that the election was "rigged" before his victory, insisted in a statement that the results should be "respected, instead of being challenged and abused".
Senator Hillary Clinton, bidding to become the first woman president of the US, consolidated her position by winning the hard-fought Nevada caucuses edging past her Democratic rival Barack Obama
Jagmeet Singh, a 38-year-old Sikh, elected the leader of Canada's New Democratic Party, becoming the first non-white politician to head a major party in the country.
Meanwhile, in a major setback to Senator Hillary Rodham Clinton, Illinois Senator Barack Obama secured the victory in the Iowa Democratic caucuses.
Veteran Indian tennis star Leander Paes and doubles partner Czech Radek Stepanek entered the US Open men's doubles pre-quarterfinals with a straight-set victory in the second round in New York.
Trump's victories came in Maryland, Connecticut, Delaware, Pennsylvania and Rhode Island, while Democratic front-runner Hillary Clinton won in Connecticut, Delaware, Maryland and Pennsylvania
Four-times champion Roger Federer weathered a tough battle against Luxembourg qualifier Gilles Muller to book his place in the US Open semi-finals with a 7-6, 6-4, 7-6 win on Thursday.
Images from Day 5 of the US Open in New York on Friday
Driven by hardship, adventurous souls mortgage their homesteads in Punjab or Haryana, pawn the family jewellery and borrow heavily to satisfy the greed of the criminal traffickers who organise their trips, points out Sunanda K Datta-Ray.
Top seed Dominic Thiem was knocked out the Rio Open in the first round on Tuesday, going down 6-3, 6-3 to Laslo Djere.
In the face of climate disaster, a new environmental movement by the name of Extinction Rebellion has risen up, and they will make sure you hear their plea -- 'To governments of the world: we declared a climate and ecological emergency. You did not do enough. To everybody else: rebel' The environmental group, which was founded in the United Kingdom, has planned a large coordinated movement -- called International Rebellion -- in more than 60 global cities. Demonstrators blocked roads and bridges leading to the Palace of Westminster in central London. They staged a "die-in" in Wellington, New Zealand. They obstructed a major roundabout in Berlin and splattered fake blood on Wall Street's "Charging Bull" sculpture. Here are some of the most powerful images from the movement.
A rampaging Madison Keys completed an American sweep of the US Open women's quarter-finals on Wednesday, dismissing Estonia's Kaia Kanepi 6-3, 6-3 to guarantee an American champion at the year's final Grand Slam.
Liverpool striker Daniel Sturridge has had successful surgery on a hip problem that effectively ended his season, he said on social media on Tuesday.
The start to the 13 Tests long season could not have been better for India. A convincing win in their 500th Test over New Zealand with spinners Ravichandran Ashwin and Ravindra Jadeja weaving their magic on a turning track to hand India a 1-0 lead in the three-match Test series. Pakistan captain Misbah-ul-Haq receiving the Test mace for their meteoric rise to No.1 ranking in cricket's traditional format. Also, football took precedence once again, a struggling Manchester United ran riot at Old Trafford as they beat Premier League champions Leicester 4-1. An outstanding first-half performance by Arsenal helping them beat London rivals Chelsea. Other top teams like Manchester City and Liverpool also taking full points.
Japan's Kei Nishikori and Victoria Azarenka of Belarus continued their Australian Open preparations by swiftly marching through to the quarter finals of the Brisbane International on Wednesday.
Novak Djokovic and Rogerer Federer loom over Melbourne Park for the year's opening Grand Slam as favourites for the Australian Open as questions remain as to whether one of Generation Next could finally end their stranglehold.
A summary of sports events and sports persons, who made news on Monday.
News that transpired on and off the football field.
Captain Kane Williamson struck a composed unbeaten century as New Zealand edged past South Africa by four wickets in a thrilling last-over finish.
The Indo-US duo beat Severine Bremond and Jelena Jankovic in the first round of women's doubles.
And the First Lady Melania was in tears -- not of joy -- after hearing about the surprise win.
Stan Wawrinka, who captured his maiden US Open title and first grand slam trophy of the year after defeating world number one Novak Djokovic, is unable to contain his excitement.
The sudden death of Enron founder Kenneth L Lay may have spared his family members from financial ruin, a media report said on Thursday.
Images from Day 4 of the US Open in New York on Thursday.
Six of the most memorable bouts to have ever taken place in the history of boxing.
Yusuf elaborated on several aspects of the Court's ruling in Jadhav's case while presenting his report to the General Assembly.
The former American first lady's campaign seemed nothing more than "a dress rehearsal" for her presidential bid.
Narendra Modi and Barack Obama will ponder over ties twice over, says Nayanima Basu
Roger Federer is bidding to become the first man in the modern era to win the title for a fourth consecutive time.
Belgium's Elise Mertens rallied from a set down to beat top seed Simona Halep 3-6, 6-4, 6-3 and clinch her first Premier-level title at the Qatar Open on Saturday.
Rediff.com recaptures these and other exciting sporting moments from the week gone by....
She beat American wildcard Alexa Glatch in the first round of the Forest Hills Women's Tennis Classic.
Snap polls conducted following the conclusion of the third US presidential debate revealed that Democrat Hillary Clinton was the winner.
Ethiopia's Meseret Defar smashed her own 5,000 metres world record by nearly eight seconds and Jamaica's Asafa Powell cruised to a sub-10-second victory in the men's 100 at a Golden League meeting on Friday.
In his first tweet after election results started coming in US President Trump claimed success. "Tremendous success tonight. Thank you to all!".
Argentina's Juan Martin del Potro knocked out third seed Roger Federer to set up a semi-final against Rafael Nadal, in New York, on Wednesday.
'Whatever else may or may not happen, China and its people are likely to pay a very heavy price for the lack of transparency of its Communist regime,' predicts Colonel Anil A Athale (retd).
