After impressive lead up form in races less conducive to recording fast times, Renshaw gave him every chance of achieving the 1:45.60 standard that he will need to achieve to be considered for the Games alongside the already selected Jeff Riseley, with IAAF rules requiring an A-qualifier to be held by all athletes in an event if two or three are to be entered.
However, tiring in the last fifty metres, Renshaw fell two-tenths of a second short with a time of 1:45.80. The performance is the fourth fastest of the 25-year-old's career, and only just short of his personal best of 1:45.66.
The race was won by Ethiopia's Mohamed Oman in 1:43.58.
Other Australians to compete were Youcef Abdi, who finished 10th in the 3000m steeplechase in 8:30.22; Ryan Gregson, who was caught in traffic at the rear of a large 1500m during its early stages and never regained momentum, finishing 19th in 3:48.39; and Zoe Buckman, who was also 12th in the women's 1500m, in 4:19.59.