In brief: Justin Gatlin easily wins; record in women’s 1,500

Track and field: American sprinter Justin Gatlin continued his fine form by clocking 9.78 seconds to win the 100 meters at the Herculis Diamond League meet in Monaco – and then warned his rivals that he can go even faster at the world championships next month with the right start.

Gatlin, undefeated in the 100 since 2013, comfortably beat countryman Tyson Gay and Frenchman Jimmy Vicaut on a hot night at Monaco’s Stade Louis II stadium.

Gay, who earlier teamed up with Gatlin as the American men won the 4x100 meter relay, clocked 9.97 and Vicaut was timed in 10.03.

The time was 0.04 outside Gatlin’s world-leading season-best, but he is the man to beat at the world championships in Beijing next month as title holder Usain Bolt struggles with a leg injury.

• Dibaba sets world record in women’s 1,500: Ethiopian Genzebe Dibaba powered down the home straight to set a world record in the women’s 1,500 meters at the Diamond League meeting in Monaco.

Dibaba collapsed to the ground in apparent disbelief after crossing the line in 3 minutes, 50.07 seconds – eclipsing the long-standing mark of 3:50.46 set by China’s Qu Yunxia in 1993.

Roared on by a cheering crowd, the 24-year-old Dibaba crushed her own personal best of 3:54.11 –the leading time this year which she set last week at a meet in Barcelona.

Four out of games after failed drug tests

Pan-Am Games: Four athletes have been pulled from the Pan Am Games in Toronto after failing drug tests.

Organizers said three tested positive for anabolic steroids: weightlifter Cinthya Vanessa Dominguez Lara of Mexico and baseball players Nelson Gomez of Puerto Rico and Javier Jesus Ortiz Angulo of Colombia. The fourth, baseball player Mario Mercedes Castillo of the Dominican Republic, tested positive for a banned stimulant.

The Peruvian delegation also says swimmer Mauricio Fiol has tested positive for steroids and has been suspended from the team. Fiol won the silver medal in the 200-meter butterfly.

Hensby, Kim share lead at Barbasol

Golf: Australia’s Mark Hensby birdied three of the final four holes for a 7-under 64 and a share of the second-round lead in the inaugural Barbasol Championship at Opelika, Alabama.

Hensby matched South Korea’s Whee Kim at 9-under 133 on Grand National’s Lake Course in the PGA Tour event for players who failed to qualify for the British Open.

The 43-year-old Hensby won the 2004 John Deere Classic for his lone PGA Tour title.

Kim shot a 66. He’s playing his 19th event in his rookie season on the PGA Tour.

Spokane’s Alex Prugh made the cut with a two-day total of 140.

• Ha Na Jang opens two-shot lead in Marathon Classic: South Korea’s Ha Na Jang shot a 4-under 67 on to increase her lead to two strokes in the suspended second round of the LPGA Tour’s Marathon Classic in Sylvania, Ohio.

Jang had a 9-under 133 total at Highland Meadows. Winless in 23 career tour events, she capped her bogey-free round with a 12-foot birdie putt on the par-4 ninth.

The start of the round was delayed 2 1/2 hours because of rain and lightning.

• Wagner, Mulder tied for lead in celebrity tournament: Actor Jack Wagner and former pitcher Mark Mulder share the first-round lead in the American Century Championship at Edgewood Tahoe in Stateline, Nevada.

Wagner and Mulder each had 26 points in the modified Stablefield scoring system.

Wagner, the 2006 and 2011 winner, had four birdies in his bogey-free round. Mulder had six birdies – four in a row on the back nine – and four bogeys.

Four-time champion Billy Joe Tolliver was third with 25 points.

Entertainer Justin Timberlake had 15 points.

Defending champion Mark Rypien had 10 points.

Orlando’s Kaka still top-paid MLS player

Soccer: Kaka remains Major League Soccer’s highest-paid player at just over $7 million, and newcomer Steven Gerrard is No. 4 behind Toronto midfielders Sebastian Giovinco and Michael Bradley.

Kaka, the former AC Milan and Real Madrid star, is earning a base salary of $6.6 million from Orlando City, according to figures released by the MLS Players Union. Including a prorated share of compensation not specified to a specific year, his total earnings are a league-record $7,167,500.

• Beckham chooses site for Miami’s possible MLS stadium: David Beckham is one step closer to bringing Major League Soccer to Miami.

The retired soccer star and his partners told Miami city officials on that they have selected a site in Little Havana next to Marlins Park for their planned stadium, which would be financed privately and built on city-owned land at an estimated cost of around $200 million.

• Timbers sign Argentine forward Melano: Having struck gold with Diego Valeri, the Portland Timbers turned again to Lanus, Argentina, for a player they hope will pay big dividends with the acquisition of 22-year-old forward Lucas Melano.

Melano comes to Portland from Argentine first-division side Club Atlitico Lanzs. He will join the team once the Major League Soccer receives his P-1 visa and International Transfer Certificate (ITC).

No. 2 seeded Karlovic advances to semis

Tennis: Second-seeded Ivo Karlovic advanced to the semifinals at the Hall of Fame Tennis Championships for the second straight year, beating Germany’s Dustin Brown 7-6 (3), 6-3 in Newport, Rhode Island.

The 36-year-old Karlovic, from Croatia, was a runner-up to Leyton Hewitt last year.

Coming off the round of 16 at Wimbledon, the 6-foot-11, hard-serving Karlovic had 23 aces, ending the match with one down the middle at 133 mph.

• Murray levels Britain’s Davis Cup quarterfinal: Andy Murray leveled Britain’s Davis Cup quarterfinal against France at 1-1 by beating Jo-Wilfried Tsonga in straight sets at Queen’s Club in London.

Britain’s top-ranked player beat Tsonga 7-5, 7-6 (10), 6-2 after compatriot James Ward was outplayed by Gilles Simon earlier in the day.

In another Davis Cup quarter, Steve Darcis and David Goffin gave Belgium a 2-0 lead over Canada with singles victories in Ostend, Belgium.

Darcis beat Frank Dancevic 3-6, 6-1, 7-5, 6-3 in the opener, and 14th-ranked Goffin came through in the second singles by downing No. 491 Filip Peliwo.

Edwards takes pole at New Hampshire

Auto racing: Carl Edwards turned a lap of 135.164 mph to win the NASCAR Sprint Cup pole at New Hampshire Motor Speedway in Loudon, Hew Hampshire.

Edwards will lead the field to green on Sunday for the first time since 2013 and for the first time for Joe Gibbs Racing.

Joey Logano, second last week in Kentucky, will start second. David Ragan, Kyle Busch and Denny Hamlin completed the top five.