If Usain Bolt can get back his medal-winning Olympic form, the 22-year-old Jamaican predicts that he will run the 100 meters in 9.5 seconds. Nicknamed "Lightning" Bolt, he won the Beijing Olympic 100-metre medal with a time of 9.69 seconds.
US sprinter Tyson Gay clocked a wind-aided 9.75 seconds in the US athletics 100-metre heats, the seventh-fastest time ever run under any conditions. Gay said he has plenty of room to improve before the World Championships in August.
In a street race on Sunday held in a chilly and windy Manchester city centre, triple Olympic champion Usain Bolt ran the fastest 150m in history (14.35sec). He also confirmed that he was looking to beat the 400m world record at some stage.
The remaining three athletes of six who tested positive for doping at last year's Beijing Olympics have been named as Dominican weightlifter Yudelquis Contreras, walk gold medallist Athanasia Tsoumeleka and Croatian 800m runner Vanja Perisic.
Along with Italian cyclist Davide Rebellin, two more athletes - men's 1500m champion, Bahraini Rashid Ramzi (left) and Geman cyclist Stefan Schumacher (right) - failed drugs tests for the doping product EPO CERA at last year's Beijing Olympics.
The International Olympic Committee has announced that six out of 948 samples re-tested for a new doping drug have come out positive, implicating six athletes. Italian cycling silver medallist Davide Rebellin is the only name known yet.
Fallen British sprinter Dwain Chambers will compete at a meet in the Paris suburb of Montreuil on June 11. He was suspended from athletics for doping between 2003 and 2005. There has been mixed feeling to his comeback earlier this year.
Jamaica's Asafa Powell, an Olympic 4x100 m champion, is to participate to the next grand prix meet in Doha despite an ankle injury. The competition will be one of the first major athletic events of year.
Kenyan Olympic champion Sammy Wanjitu set a new record at the London marathon, closing the race in 2 hours 5 minutes and 10 seconds. In the women's event, Germany's Irina Mikitenko fought off Britain's Mara Yamauchi to retain her title.
Five former East-German trainers have admitted they participated in a huge state-supported doping system before the fall of the Berlin wall. The historic admonition of guilt has been widely welcomed in Germany.