Marsel said he was injured in the leg, I believe. Personally, I think he just has severe confidence problems, as does Gimeno, who cannot hold leads whatsoever.
Ciric I read wasn't 100% (which I said a month ago in this very thread
), so he's either playing injured and losing R1 everywhere, but I think he basically just isn't a good player and is overranked, and cannot hang at the challenger level. Today he was actually competitive in his match but it was against an 18 year old ranked #607.