Training mode where you have to support your AI GC contender by doing various interval efforts.
Eg dropping back for water bottles then getting back to your team to desribute them. Closing down attacks on mountain stages, providing a lead out for your sprinter etc.
If you hit your targets your guy wins stage and the whole tour could be your training block.
I think this is more in the spirit of Zwift as I find training mode a bit too similar to trainer road but with graphics.
Thanks for reading