I don't think Semedo had a good game, but I don't get how he's blamed for the goal. It's a simple 2 v 1, he was going to lose in any which way, with Rakishit just staring at them gliding past their man.
I think Semedo has shown potential and bright spots in games; far more than what Rakitic and Suarez have shown this season. Yet, Semedo is consistently punished for having a poor game, while mediocrity is rewarded with unlimited playing time for the guy who probably keeps a Maharaja Mac stuffed down his stockings.
Semedo needs some playing time to build up his rythmn. It can't help that he almost never has a run of games with one particular RW; sometimes its Deulofeu, sometimes it's Rakitic or Paulinho, and most times it's nobody. It's shocking to see people pining for Roberto, who is a fine player, but just go back and look at the Roberto forums at the end of last season. People were flaming him for not being anywhere CLOSE to good enough, and most posts said he should never play anywhere near RB again. And yet, here we are, with Roberto suddenly being our RB saviour.
I definitely think Semedo is better suited for RB, he has the pace and athleticism for it. He has shown he is good defensively (I thought he did a great job against Costa in Turin) and just needs a functioning RW to show his attacking potential. I am fairly confident most people here will be eating their words, sooner than later.