Periault and Duffy were running shoulder to shoulder but the Frenchwoman pulled away from the Bermudan on the third lap of the run.
A three-way voting process will determine the finalists.
Images from the World Athletics Championships in Eugene, Oregon, on Friday, Day 8.
The 20-year-old Indian, who was competing in the season's Diamond League Series Finale just three days after winning Asian Games gold in Jakarta, sent the spear to a best distance of 85.73m to end at fourth position in the eight-man event.
Tiger Woods's chances of returning to action in time for next year's first major look grim, according to former Masters champion Sandy Lyle. Woods, who won the first of his 14 major championships at Augusta in 1997, issued a statement on Friday saying he is taking an "indefinite break" from golf following revelations about his private life.
The 21-year-old stuttered on the penultimate barrier but surged down the home stretch to power across the line and beat her previous record of 51.90 set at the U.S. trials in June.
Images from the World Athletics Championships in Eugene, Oregon, on Saturday, Day 9.
The Indian ace emerged victorious from a four-hole playoff at the 36-hole final Asian qualifiers to secure a berth at this year's British Open.
A summary of sports events and persons who made news on Friday
The Italian and Japanese battled shoulder-to-shoulder as the leading pair in the final 4km, but the Italian coped well with the pressure and accelerated in the final 300m to seal the gold medal.
At his peak Bolt was probably the world's most recognisable sportsperson and certainly one of the most marketable. In contrast, the two 2020 Athletes of the year were Swedish pole vaulter Mondo Duplantis and Venezuelan triple jumper Yulimar Rojas.
Adding 20 minutes to a daily walk and increasing vigorous daily activity by eight minutes would be enough to achieve a lower sleep apnea risk, a study has revealed.
Ugandan smashed Bekele's 16-year-old record at Monaco Diamond League on Friday.
Images from Saturday's third round matches in the FA Cup.
Images from Saturday's proceedings at the World Athletics Championships in Doha.
Everton's Abdoulaye Doucoure scored an extra-time winner as they edged Rotherham United 2-1 in an absorbing FA Cup
A summary of sports events and persons who made news on Wednesday
Danny Willett won the 80th Masters by three strokes on Sunday to become the first English winner at Augusta National Golf Club since 1996. Here are a few interesting little known facts about the rising golf star...
Arjun Singh improved his chances of returning to the tour with a tied eighth place finish at the Macau Open golf tournament.
Caster Semenya put aside the controversy over a planned rule change in athletics regarding hyperandrogenism to win the women's 1,500 metres
Pack your bags. Umbrellas and raincoats optional.
A summary of sports events and persons who made news on Monday
Sifan Hassan of the Netherlands broke the 23-year-old women's mile world record on Friday when she clocked four minutes 12.33 seconds in a race dedicated to former American runner Gabe Grunewald, who died from cancer last month at the age of 32.
Summary of sports events and persons who made news on Tuesday
Friday's explosion on the London tube is the latest in a string of terror attacks in the United Kingdom in recent years. Here is a timeline of the terror that has unfolded in the UK.
The two "terrorist incidents" at London Bridge and Borough Market on Saturday night are among several attacks that have taken place in the United Kingdom in recent years.
Only world indoor record holder Christian Coleman has run faster than Baker's 9.87 seconds over 100 metres this year, and Baker was more consistent
List of Australian Open women's singles champions since the event began in 1922 (Australian unless stated):
List of Australian Open women's singles champions since the event began in 1922 (Australian unless stated):
Following Serena Williams's 19th Grand Slam title, here is the list of Australian Open women's singles champions since the event began in 1922 (Australian unless stated)