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Italian police are reportedly investigating shock 100m Olympic champion Lamont Marcell Jacob's former nutritionist for alleged steroid distribution.
Jacobs stunned the world after becoming the first Italian to ever win the men's 100m final at the Olympics after a blistering 9.80 seconds in the blue ribbon event.
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Jacobs then became a double Olympic champion on Friday, as he pulled off another sensation with his mates - Lorenzo Patta, Eseosa Fostine Desalu and Tortu - to match his equally unlikely solo triumph of five nights earlier.
However, Jacobs' agent confirmed the athlete split with nutritionist Giaocomo Spazzini, who is a professional bodybuilder, following reports he was the subject of a police probe, according to the UK Times.
Spazzini owns a fitness and nutrition consulting company and has boasted repeatedly of training Jacobs.
Jacobs' agent Macello Magnani denied any connection between his athlete and the investigation having claimed he split from Spazzini in March.
He also denied Jacobs had taken any performance-enhancing drugs.
Per documents obtained by the Times, police are investigating the alleged use or supply of performance-enhancing drugs involving the alleged sale of anabolic steroids flagged by a Milan pharmacist.
The leader of the group is accused of obtaining a prescription pad and a doctor's stamp to procure the drugs illegally.
Furthermore, it has been reported Jacobs was not included in the Athletics Integrity Unit's (AIU) testing pool.
The AIU targets the world's best athletes, but Jacobs - who failed to qualify for the finals at the World Championships in 2019 - wasn't on the list.
Marcell Jacobs stuns Olympics in 100m
The Tokyo Olympics are the first since Athens in 2004 to take place without Jamaica's Usain Bolt, winner of eight golds.
Bolt retired after the 2017 world championships in London, after taking three consecutive Olympic 100m titles in Beijing, London and Rio de Janeiro, as well as three straight 200m crowns.
The semi-finals were blown open on Sunday evening in Tokyo when the man many tipped to take Bolt's crown - American Trayvon Bromell - missed out on making the final.
Bromell, who owns the fastest time this year of 9.77sec, the seventh-quickest in history, scraped through in his semi-final but could only muster a 10.0 seconds in the semi-final to bow out of contention.
Jacobs put his rivals on notice by breaking the European record in his semi-final but few could have imagined what he would produce in the final.
He then backed it up with the second leg of Italy's 37.5-second trip around the track, while Tortu, who was slightly behind at the final changeover, outraced Britain's Nethaneel Mitchell-Blake to the line by one hundredth of a second for gold.
The triumph set off a second bout of Italian sprint celebrations on the track at the Olympic Stadium - two more than anyone expected when these Games opened.
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