Former champ Greene backs Blake to beat Bolt in 100m

London -  Former world 100m record holder and Olympic gold medallist Maurice Greene has tipped Yohan Blake to win gold be beating teammate Usain Bolt at the London Olympics.

Greene, who won five world champions and two Olympic gold medals in the 100m and 200m in Sydney, said Bolt had not fixed technical problems in his running that were apparent two years ago and it was too late to try to fix them now.

"Blake is going to win. Blake is just a little bit better and if you go back and look at the Jamaican trials they say Bolt had a bad start but look at Blake too he was right back there with Bolt, they both had bad starts and Blake was still able to come out victorious in that race. I mean even though he is having slow starts he still gets second though so he is still able to overcome some things," Greene said.

The American sprint legend said Bolt would still win comfortably the 200m, but his countryman Blake would deny Bolt the chance to win back-to-back gold medals in the 100m, Stuff.co.nz reports.

Another former track champion Edwin Moses, the two-time world and Olympic 400m hurdles champion, has also backed Blake to beat Bolt.

Moses said: "In track and field we have a saying that stuff happens and you are only as good as your last race ... I am going to say Blake (to win gold) I think he is the man to beat."

Greene agreed with the recent suggestion that it was possible the 100m record time could drop to as low as 9.4 seconds.