If Machado does not win this week, he should seriously think of retire. You cannot find a much worse field than this, even by future standards. He was top 60 2 years ago, FFS! I know he had serious injurieS but he already came back 4 months ago. He should be playing Challengers (and going far on them), but he is still outside top 400. WTF!
Lol, you must be joking, I hope. Do you really think that after an injury like Rui had he would be playing on Challenger lever 4 months after? He already had a serious injury some years ago and in 2007 he just reached 2 Future semi-finals! So what? He has to go slowly, you must be more patient. Just in 2008 he started to win some Futures and playing at Challenger level. Just in 2011 he reached his best. An recover is really hard and you have way more examples from other players, who took so many months to get back on track. For example... Devvarman. He didn't reached his best tennis yet but he's coming close. How many months did he needed?
Take it easy, dude...