Just did this a couple of days ago. Make sure assists are off. As soon as they give you control at the start, take a hard right into the traffic and stay mid-high on the first turn. On the second turn go deep inside and this should get you into 3rd. From there you should be able to pass them at the first turn on the second lap to gain first. Make sure you take the last turn low so they dont draft you. Did it with a DS3, so you shouldnt have a problem.