The first time I ran Blue at an A-meet was in Ohio in November 1988. Sharon Crawford was looking over the start list and said, "Oh, J-J, look, Jörgen Mårtensson is starting 30 minutes after you. When he passes you, try to see how long you can stay with him".
(I never saw him out there, but I finished after him, in last place.)
Your first mistake will be "running hard out of the gate". Run the way you normally would and your chances of staying in front longer will be better because you'll avoid mistakes. Plus, when he does catch you (assuming you make the same route choice), you'll be able to keep him in sight a bit longer if you aren't overly fatigued.
With a 9 minute head start and a 13+K course, I'll predict he will catch you between the 1/4 and 1/3rd point of the race.
I had my dream WOC middle distance final start position back in 2009. Two minutes behind Thierry and two minutes ahead of Ganon. BUT it wasn't the WOC final and no I hadn't qualified with a stellar run BUT this start order did happen at the Quebec Champs. I never saw Thierry (of course) and Ganon caught me at the first control after I messed up because I was thinking more about them than the map.
Hey there's a map of world class sprint terrain in Toronto!