David Rudisha can't wait to get back to the stadium where he ran a world record time five years ago and is confident he can maintain his dominance of the 800 metres at the world championships in London next week.
The 28-year-old Kenyan still holds the two-lap world record with the one minute 40.91 seconds he ran for his first Olympic gold, when he lit up a packed East London stadium on a balmy August night in 2012.