SWITZERLAND sprinter Alex Wilson, 30, shook the U.S. 100m new European record of 9.84 on Sunday.

Also in the 200 meters he ran for a new Swiss record of 19.89.

Doubts arose immediately, as Wilson’s jump in results is confusing.

His six previous 100-meter results this season had ranged from 10.66 to 10.38.

His record before Sunday was 2019 run 10.08.

Read more: The 30-year-old sprinter ran the European record, which completely silenced the bush - then doubts arose

Several Swiss experts said they did not believe Wilson really ran a European record.

For example, the possibility that the timing had failed was raised.

Speeding expert PJ Vazel suspected on Twitter that Marietta’s field, near Atlanta, did not have the electronic start system required by the International Athletics Federation, so Wilson’s European record may not be officialized.

Now Wilson is at the center of an even worse uproar.

The Swiss newspaper Tagesanzeiger published a video whereby Wilson is training with Ray Stewart, who has been banned for life because of doping.

The case is reported by Blick magazine, among others.

In a 90-second video that has since been removed from Instagram, Wilson seems to be practicing in Las Vegas with Stewart.

Stewart, now 56, ran the first Jamaican 100 meters under the 10-second ghost limit in 1989. He won the 100-meter World Championship silver in Rome in 1987.

In 2010, the U.S. anti-doping organization Usada issued a lifetime ban on the supply of doping substances to Stewart, who worked as a coach.

Stewart’s coaching can also have consequences for athletes, Blick writes.

Wilson explained, according to Blick, that he did not know Stewart.

- I was training in Las Vegas when Stewart happened to play football on the grass.

My coach asked if I knew him.

I replied that I did not.

My coach then said he’s the first Jamaican to run 100 yards in less than 10 seconds, so maybe he could have some tips.

Wilson said he would not have cooperated if he had known Stewart's background.

- I didn't actually practice with him.

My coach asked Stewart if he could give me any tips, so he gave them for ten minutes, Wilson explained.

Alex Wilson won the 200-meter European Championship bronze in 2018 in Berlin.

Photo: Hendrik Schmidt / DPA / ZUMA / MVPhotos

In another story, Swiss newspaper Blick estimates Wilson may be in trouble.

- Wilson can't do anything about it if the race timers were the wrong kind.

But if he really worked with doping coach Stewart, he has a problem, reporter Emanuel Gisi ponders in his comment.

Wilson is scheduled to compete in the 100 and 200 meter Olympics in Tokyo.