MARTHA KELNER: Justin Gatlin can produce a nightmare scenario for advocates of clean sport by breaking Usain Bolt’s 100metres world record this summer, according to ex-sprinter John Regis.

Controversial Justin Gatlin set the stage for a world championship showdown with Usain Bolt when he won the 200 metres in a blazing 19.57 seconds at the U.S. trials in Oregon on Sunday

The credibility of Alberto Salazar’s defence against doping allegations has been further undermined by an interview he gave about a controversial incident involving Justin Gatlin in 2006.

Next month’s World Championships men’s 100m final is in danger of rivalling the 1988 Olympic final in Seoul as the ‘Dirtiest Race in History’.

Justin Gatlin could win world championships and go undefeated for a second consecutive season but he would still not be ineligible for the sport's athlete of the year award.

Justin Gatlin accused British Athletics of hypocrisy after they refused to invite him to compete in the London Anniversary Games, despite paying other drugs cheats to appear.

American sprinter Justin Gatlin continued his fine form by clocking 9.78 to win the 100 metres at the Herculis Diamond League meet on Friday.

Usain Bolt blew away any fears about his fitness and fired a major warning to Justin Gatlin as he blasted to his fastest 100 metres of the year on his return to the Olympic Stadium on Friday night.

MARTHA KELNER AT THE OLYMPIC STADIUM: Usain Bolt allayed any concerns over his fitness, twice running 100m in 9.87 seconds at the Sainsbury's Anniversary Games.

On Sunday night the best 100m sprinters in the world will settle down on to their blocks in the iconic Bird’s Nest Stadium in Beijing, the scene of much heroics in the 2008 Olympics.

MATT LAWTON: Seb Coe has said he will feel ‘queasy’ should Justin Gatlin, or any other convicted drugs cheat, win gold at the World Athletics Championships in Beijing.

MARTHA KELNER IN BEIJING: Usain Bolt goes head to head with the two-time drug cheat over 100m and 200m at the World Championships in Beijing this weekend.

Usain Bolt turns 29 on Friday. There might be a modest slice of cake and a rendition of Happy Birthday from his Jamaican team-mates but otherwise the significance of the day will be ignored.

MARTHA KELNER IN BEIJING: The roll call of winners from the first round of the World Championships 100m was almost farcical with four of the seven previously serving drugs bans.

OLIVER HOLT: If Justin Gatlin wins, it will be a terrible indictment of a sport. If Usain Bolt wins, it will merely reinforce the idea that he is all that stands between athletics and oblivion.

Usain Bolt managed to survive a stuttering start to move into the World Championships 100m final in Beijing, setting up an enticing showdown with Justin Gatlin, who stormed through in his heat.

As Usain Bolt fulfilled his final media duties inside the Bird’s Nest stadium after winning 100m gold, with cleaners tidying around him and, a fan draped draped in the Jamaican flag screamed: ‘Yes Usain Bolt!'

American sprinter Justin Gatlin will refuse to speak to British media and the BBC in the future following 'hurtful attacks' and 'biased views' in reports having won silver in the 100m World Championship final.

'Good versus evil' is a step closer to resuming in the 200 metres at the World Championships in Beijing after Usain Bolt and Justin Gatlin cruised into the semi-finals.

Usain Bolt and Justin Gatlin set up the sequel to their world championship sprint showdown on Wednesday, both winning their semifinal heats in the 200 metres.

Justin Gatlin hopes the public will see him as a 'human being' rather than a drugs cheat after the World Championships. Gatlin finished second in the 100m and 200m in Beijing.

Justin Gatlin is the 100m Diamond League champion after taking a closely-fought victory in Brussels at the final Diamond League meeting of the year.

JONATHAN MCEVOY: 20 years on from becoming the only man to claim an Olympic 200m and 400m double, Michael Johnson opens up on the problems facing his friend Lord Coe and British hopes in Rio.

USA's Justin Gatlin, 34, hopes to become the fastest man in the world, beating out rival sprinter Jamaican Usain Bolt. The New Yorker has been banned from the Olympics twice for doping

Usain Bolt and America’s Justin Gatlin have both won through their 100m semi-final heats to set-up an epic Olympic final later tonight.

Losing is one thing. Justin Gatlin didn't expect he'd get booed at the Olympic 100-metre final, too. He took silver for the United States, in Rio on Sunday, edged by rival Usain Bolt of Jamaica.

The parents of controversial US sprinter Justin Gatlin have rushed to his defense as the weight of being public enemy number one in the Olympic arena took its toll on him.

The Jamaican was forced to settle for third in his final solo race at the London Stadium on Saturday after being beaten by the USA's Christian Coleman, who claimed silver, and Justin Gatlin, who won the gold.

Bolt claimed all the headlines as the star of a generation took his final bow in an emotional night in the English capital. And his sporting contemporaries paid homage to his career.

Justin Gatlin was again cast as the pantomime villain by the crowd at the London Stadium on Sunday as he collected his 100m gold medal after beating Usain Bolt to re-gain his world title.

After finally earning his first Tour title on Sunday night, US PGA Championship winner Justin Thomas was quick to share the moment with his proud mum and dad, and then Tiger Woods.

American sprinting legend Justin Gatlin fired longtime coach Dennis Mitchell after the reigning 100m world champion was implicated in a doping scandal. Gatlin steadfastly denies doping.

Gatlin has rejected the allegations, for which he is considering suing the newspaper, and has sacked Mitchell, who won 4x100m relay gold for the USA in 1992 before being banned in 1998.

The 22-year-old Brit stormed through on the line to record an impressive season's best of 10.04sec in driving rain, edging out the Chinese pair of Su Bingtian and Xie Zhenye.

Jerome Boateng has been fined by Bundesliga giants Bayern Munich after crashing his Mercedes on the motorway while driving back from visiting his ill son.

Bayern Munich goalkeeper Manuel Neuer has taken to Instagram to show off how he is keeping his reflexes sharp during the football shutdown.  

Bayern Munich have sealed a contract extension for Hansi Flick that will see the head coach remain at the club until 2023.

Chelsea have reportedly made the first move in the race to sign Philippe Coutinho this summer. The attacking midfielder joined Barcelona from Liverpool in a deal worth £145m two years ago.

29-year-old winger Costa featured under Pep Guardiola at Bayern Munich during his spell in Bavaria, but has largely fallen out of favour in Turin this season.

Few players are heading into the summer with their future as uncertain as Barcelona's Philippe Coutinho. With that in mind, Sportsmail assesses his potential landing spots - and where he suits best.

A new contract for Manuel Neuer is no closer. Amid interest from Chelsea and with the clock ticking on his current deal, Neuer and his agent Frank Kroth are digging their heels in during talks with Bayern.

​Bayern Munich chairman Karl-Heinz Rummenigge has voiced his opposition to the formation of a European Super League.

Former Manchester United and Tottenham star Dimitar Berbatov has urged Timo Werner to sign for Bayern Munich instead of Liverpool this summer. He has impressed for RB Leipzig.

Bayern Munich players will return to training on Monday for the first time since the Bundesliga campaign was suspended. The top flight has been on hold since March 13 due to the coronavirus pandemic.

'Outrageous' transfer fees will become a thing of the past after the coronavirus pandemic, Bayern Munich president Herbert Hainer believes.

First-team stars Robert Lewandowski and Kingsley Coman were seen entering Bayern's training facility on Monday morning as the players returned to action in small groups.

Boateng's relationship with Bayern has soured after he was fined by the club for breaking coronavirus guidelines regarding essential travel, while he is about to enter the last 12 months of his contract.

Muller has been at the Bundesliga giants since 2008 and has put pen to paper on a new deal until June 2023. The 30-year-old crucially kept his social distance for some very unusual photos.

The Bundesliga giants have already started looking at transfer plans ahead of the summer window and both the RB Leipzig striker and Manchester City winger are firmly on their radar.

Manuel Neuer is 'unlikely' to be at Bayern Munich next season because the 34-year-old goalkeeper wants a five year contract extension.