Just, how do you play against a Fiora. I just can't.
I think I should stop giving advices and looking on internet for others: I'm kinda spoiling you guys
There are 5 things that counter Fiora
Being untargettable, armor, ganks, well-timed cc and not giving her kills or farm (the last 4 basically counter any carry)
-About not giving her kills of farm, just freeze the lane or farm under tower (hers or yours): Fiora is a champion that while she can snowball easier than the others, she also suffer the most when not being able to snowball
-Fiora has mainly 2 skills that decide her damage output: E and R. About her E, it lasts 3 seconds as long as she doesn't get a kill: if you manage to keep her at bay with some cc (even a slow is fine in these cases), she loses half of her killing potential
-Her Q is her only mobility skill and can be used only on enemies: ganking her should be easy (especially if you freeze the lane (however, be careful when she hits level 6 though))
-She has tons of attack damage thanks to her W passive and the build people normally use (they get more AD than AS (since she already has her E for that)): getting armor greatly reduce her damage output, especially if you get things like Thornmail, Randuin or Frozen Heart
-When she ults, if you become untargettable (Zhonya, ecc.) before she can complete her first strike, you completely negate her skill (otherwise you simply dodge all her hits in the case you're alone)
Now, about champions who counters her
-Malphite demolishes her: he deals mainly magic damage (she can't counter it with her W), he can stack armor while still being a threat and his AS reduction with his E hinders her heavily
-Picking Lissandra is usually a good counter normally for all hard carries (even though people call them "hyper carries" when they don't know what they're talking about): you can escape her engagements with you W and E, poke her down with your Q and in the case she ults you you can ult yourself to negate her damage while damaging and slowing her (also, in teamfights you can use your ult to lock her down so that you can burst her down)
-Jax is considered a good counter against her, however she can outsmart him by ulting when he uses his E (in this case you mitigate the damage, but it's still damage)
-Ranmus wears her down in teamfights, since he can lock her down for quite a good amount of time while not receiving any significant damage and dealing tons of it to her
-People with blinds (Teemo, Quinn) or with untargettable skills (Vladimir, Shaco, Kalista (if she targets your companion), ecc.) have a chance, if they're good, to mitigate/nullify her R (or E too)