The head of Russia's anti-doping laboratory resigned late Tuesday, hours after his laboratory was suspended over accusations it was part of state-sponsored doping program that experts fear could snowball into an international crisis for the sport.

The World Anti-Doping Agency (WADA) has accused Grigory Rodchenkov of being at the heart of a scheme to cover up widespread use of illegal drugs among Russian athletes, including deliberately destroying positive test samples.

Other golfers beware. With an ultra-competitive domestic tour and a seemingly limitless supply of young, talented players willing to sacrifice everything for success, South Korea's dominance of world women's golf is not going away -- and if anything, it could get even stronger.

For years now, rivals have watched in wonder as a succession of South Korean players with immaculate techniques and nerves of steel have lifted trophy after trophy, including five of the last 10 major championships.

Brazil superstar Neymar returns from suspension to face an injury-hit Argentina on Thursday as South America's qualifying campaign for the 2018 World Cup resumes with a showdown between the bitter continental rivals.

Neymar was forced to sit out Brazil's opening two qualifiers last month -- a 2-0 defeat to Chile followed by a 3-1 victory over Venezuela -- following his four-match suspension at the Copa America in June.

Disgraced former IAAF president Lamine Diack on Tuesday resigned as president of the International Athletics Foundation in the wake of damaging corruption charges that have rocked track and field.

"The IAAF confirms it has tonight (Tuesday) received a letter from Lamine Diack resigning his position as President of the International Athletics Foundation (IAF)," the IAAF said in a statement.

Russia's athletics federation should be suspended from all competition, including the 2016 Olympic Games, over widespread doping, a damning report by an independent commission of the World Anti-Doping Agency (WADA) said Monday.

The report outlined evidence of systematic cheating with the consent of the government in Moscow, noting that drug tests for athletes were conducted at a Russian lab that totally lacked credibility.

Former France international Patrick Vieira has joined New York City FC as head coach on a three-year deal from parent club Manchester City, it was announced Monday.

Vieira, who had been head of Manchester City's Elite Development Squad and had been talked of as a possible candidate to take the top job at the Etihad, replaces sacked coach Jason Kreis.

The battle for Serie A supremacy is the closest in years but Juventus sitting nine points off the pace is not enough for the Turin giants' potential successors.

After 12 games, only five point separate the top five teams, four of whom can harbor serious scudetto ambitions following Juve's disastrous start to their title defense.

Former Manchester United manager David Moyes was sacked by Real Sociedad on Monday after a turbulent year in charge during which he failed to turn around the Basque side's fortunes.

"Real Sociedad have decided to cancel the contract of first team coach David Moyes," a club statement announced.

Lazio's Senad Lulic has offered apologies to Mohamed Salah for a crunching tackle that has ruled Roma's Egyptian winger out of action for up to six weeks with ankle ligament damage.

Salah, who has hit five league goals for the Giallorossi since making his move from Chelsea permanent, is expected to be out until the New Year after being stretchered off early in the second half of Roma's 2-0 derby win on Sunday after his right ankle bent inwards under the impact of Lulic's stamp.

Athletics is braced to be rocked on Monday by a damning report into allegations of widespread doping and blackmail in a sport long-viewed as the flagship of the Olympic Games.

Just 270 days out from the start of the 2016 Rio Olympics, an independent commission set up by the World Anti-Doping Agency (WADA) will release its findings into a scandal already viewed as more damaging than the corruption crisis engulfing world football governing body FIFA.