Sport James Dasaolu last year ran the second-fastest 100m time by a British sprinter ever

As James Dasaolu settles in the blocks for his first race of the season in Glasgow on Saturday there will be a sense of expectation and apprehension over whether he can back up his breakthrough year.

Sam Bennett wins the Tour of Britain’s fifth stage in Caerphilly

Tour of Britain: Sir Bradley Wiggins pays tribute to team-mates after surviving tough day

If he didn't appreciate the value of teamwork already, then a day spent repelling numerous attacks in the Brecon Beacons was enough to ram it home. Sir Bradley Wiggins paid tribute to his Team Sky colleagues last night after he retained his lead in the Tour of Britain today on a gruelling stage five that pushed the 2012 Tour de France winner to his limits.

Mo Farah and Haile Gebrselassie meet in the Great North Run

Mo Farah’s greatness on the line against Ethiopian marvels Haile Gebrselassie and Kenenisa Bekele

There have been crossroads in Mo Farah’s life defined by Haile Gebrselassie.

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Modern trainers with thick heels makes it more difficult for young people to learn to run using the front foot

Asafa Powell and Sherone Simpson learn their fate yesterday

Asafa Powell faces ban after drug-test B sample proves positive

Asafa Powell and four other Jamaican athletes who failed drugs tests earlier this year have each returned adverse analytical findings in their B samples, the Jamaica Anti-Doping Commission revealed last night.

Usain Bolt on the podium with his third gold of the Championships and eighth gold at the Worlds overall (Jamie Squire/Getty Images)

Usain Bolt confirms plan to retire after Rio de Janeiro Olympics

But he plans to continue his dominance of the sport until then as he looks to become the most successful sprinter of all time

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Usain Bolt

Usain Bolt delighted with latest win in Diamond League

Jamaican powered through after slow start

Tyson Gay celebrates after winning the Men's 100 m event during the Diamond League Athletics meeting

Steroid found in sample of banned US sprinter Tyson Gay

Details emerge of substance that led to ban

Asafa Powell has blamed his failed test on a supplement

Robin Scott-Elliot: Athletics risks being dragged down by lack of speedy action over Jamaica's drugs scandal

It is the question every athlete or cyclist who achieves something out of the ordinary will be asked for now and probably ever more: Are you clean? Did you run the 100m at lightning speed without illegal aid? Did you scale that mountain dancing on your pedals without an unnatural high?

The Great Britain 4x100m relay team of (left to right) Adam Gemili, Harry Aikines-Aryeetey, James Ellington, and Dwain Chambers celebrate their bronze - but they were soon notified of their illegal changeover
Usain Bolt (second from right), celebrates with Jamaican 4x100m team-mates (left to right) Nickel Ashmeade, Kemar Bailey-Cole, and Nesta Carter
Tiffany Porter, left

World Championships: Christine Ohuruogu sets example as medals keep coming

Following on from Mo Farah's flying finish in the 5,000m final on Friday, the British medals kept coming in the home straight of the Luzhniki Stadium on the penultimate day of the track and field World Championships. First Christine Ohuruogu, winner of the individual 400m crown on Monday, anchored the women's 4 x 400m relay team to bronze. Then Tiffany Porter – the 100m hurdler from Michigan with the British parents and the UK passport – took bronze in her final.

Great Britain's Adam Gemili after his 200metre final on seven of the 2013

World Championship: Adam Gemili quickly making up ground after career change

And to think… instead of settling into his starting blocks next to Usain Bolt in the World Championship 200m final yesterday, Adam Gemili might have been lining up for Dagenham and Redbridge at Glanford Park, home of Scunthorpe United.

Usain Bolt, centre, leads the field, including Adam Gemili, left, in his 200m victory in Moscow

World Championships: Usain Bolt triumphs again in league of his own

Jamaican secures his seventh world gold by defending 200m title with ease, while Briton Gemili narrowly misses out on medal

Mo Farah stretches away to take 5,000m gold in Moscow last night

World Championships 2013: Feel-good Friday for Mo Farah as British superstar completes incredible 'double double'

The best efforts of Africa’s finest cannot deny the superstar of distance running his double double glory on the Moscow track

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