The Scot is a medal contender for Team GB at Tokyo 2020 and comes up against world class rivals Siffan Hassan and Faith Kipyegon
Joined by compatriot Katie Snowden on Team GB, the Scot finished fifth at the Doha World Championships and came fourth at London two years earlier.
The 28-year-old is in fine form and has decided to concentrate on the 1,500m after qualifying for the 800m as well.
Now Muir will face a tricky semi-final at the Olympic Stadium on 4 August, featuring in the second semi-final, which will allow her to know what time is required if she does not finish inside the top five and requires one of the next fastest two finishers.
Muir will get underway at 11:12am BST (7:12pm local time) with history-chasing Siffan Hassan in her heat as she eyes a historic gold treble in the 1,500m, 5,000m and 10,000,
Muir’s PB of 3:55.22 puts her among the favourites to challenge both Hassan and Kenyan Faith Kipyegon, who is the odds on favourite for the race.
Muir will have to draw on her substantial experience at major championships, as well as Diamond League meets, where she has two wins in 2016 and 2018.
Currently ranked No 4 in the world at the 1,500m, Muir has great depth with her aforementioned qualification for the 800m at Tokyo 2020, and a PB of 1:56.73 at that distance.
While she has also represented Team GB at the 5,000m at the 2017 London World Championships, with a PB of 14:52.07.
There is encouragement for Muir ahead of these Games, with a memorable third in the Florence Diamond League, running 3:55.59 to push Hassan, the winner in 3:53.63, and Kipyegon.