The only instances I could find in which Citroen could have asked Sordo not to challenge Loeb are Catalunya 2007 and Catalunya 2009. Maybe New Zealand 2008, but was a particular case, as Hirvonen and Latvala threw the rally away at the penultimate stage while they were 1st and 2nd.
I think he was sometimes close on tarmac and that would create some pressure, except both would know that they will hold position. Anyway overall he was under control and never a danger to Loeb in the championship.
I would put a bit of blame also on (lack of) team principal.. Fourmaux should have driven on steady pace with nice gap to Ogier. Even Ogier just passing him wouldn't have been too much of a problem.
Not a disaster for Fourmaux really, if he can get back to service ok. Still in 3rd and out of the battle at the front which could have led to him pushing too hard anyway. Can concentrate on podium...
How can you drive steady with 13s gap and Ogier going flat out behind?
[WRC] Acropolis Rally 2025