Yes, there is!
When training in multiplayer mode, a slipstream effect is applied and you can see it on the app with an animation when someone or a group is just in front of you.
Note that the slipstream effect is more important when you are in a group.
At the end of the training session, you can check where you benefited to a slipstream effect:
The greyed parts on the speed chart show that you benefited to a slipstream effect.