I am not sure if you are training for specific event but specificy point of view sprinting usually happens in the end. E.g. I usually do few sprints at the end of Z2 ride. By doing it this way it should not hamper the main goal of specific exercise of the day and also trains the body to sprint when fatigued.
The peak power will be most likely lower after than before. Not sure if there would be more benefit for fresh sprinting for sprinting capacity. But atleast it can impact the rest of the workout negatively.
One option might be just do short sprint workout of few times e,g, 30s max efforts with few minute rests between the intervals.