London Adam Gemili

Adam Gemili has tweeted a message to fans after he was taken off the athletics track in a wheelchair with a hamstring injury at the Birmingham Grand Prix.

London sprinter Adam Gemili has crashed out of the Birmingham Grand Prix with a hamstring injury. A little earlier he had achieved a career milestone when he ran his first sub 10 second 100m.

The 21 year old from Dartford ran 9.97 secs in Birmingham to become the first Briton to go under both 10 seconds in the 100m and 20 seconds in the 200m.

He was taken from the track in a wheelchair as the American, Marvin Bracey went on to win the final.

British sprinter Adam Gelili has tweeted about his team being disqualified from the 4x100m relay at the World Athletic Championships in Moscow today:

Read: Adam Gemili fifth in 200m World Championship final

Team GB loses its bronze medal in the 4x100m men's final for an illegal changeover.

Adam Gemili is going for World Championship glory tonight, just 18 months after swapping football for a career in sprinting. Only 19, the former Dagenham and Redridge defender will line up in the 200 metres final next to world record holder Usain Bolt in Moscow.

Gemili goes into the race fresh from a remarkable day in which he became only the second Briton ever to break the 20-second barrier.

Having headed to Russia with a personal best of 20.30 secs, he lowered that to 20.17s before producing a 19.98s semi-final sprint - a time quicker than that managed by Bolt yesterday.

Adam Gemili has stormed into Saturday's 200m final by winning his semi-final in 19.98. He's only the second Briton to run sub-20 seconds in the 200m, along with John Regis, who holds the British record at 19.87.

19-year-old sprinter Adam Gemili saw off his British rivals in the men's 100m B race at the Olympic Stadium in Stratford. He won with his fastest time of the season, 10.16 seconds.

Perri Shakes-Drayton set a personal best time of 53.67 seconds in the women's 400m hurdles. She came second behind the Czech athlete Zuzana Hejnova.

London sprinter Adam Gemili had his first race of the season this morning - against a robot.

The 19-year-old is using the robot to test his speed against and says racing the 'mechanical man' is exciting as it is a world first.

London sprinter Adam Gemili had his first race of the season this morning. But, he was up against some very unusual opposition in the form of a robot.

The 19-year-old is using the robot to test his speed against and says racing against the 'mechanical man' is exciting.

Adam only made the transition from professional footballer to Olympic sprinter last year when he made his debut at London 2012 Games.