If you cant rest a player against bottom place QPR (with only one win to their name) at home then you will NEVER rest him.
Chelsea have Marin, Oscar, Moses, Hazard and Torres as replacements and fail to win and the person to blame is Rafa, really? I guess he is the first manager to rest a player. Sir Alex rested Van Persie against West Brom the other day (with Wayne Rooney absent), I guess he was cuckoo too.
I can understand if we dont rest Suarez, its because we dont have good enough players to ensure us a victory and also for the simple reason that Luis would sulk the whole time anyway.