I'm Fuxed and I'm a top main. I used to play Master Yi until he got nerfed so hes not as good as he was before. I play in EU West and am a bronze division noob. If you get fed with Fiora you can carry your team even if your loosing the game. Just let your team go in first or you go in first if they are all low health.

As of Season 4:
Some good games in Ranked:

Fiora is such a versatile champ and a very good early game one. Once you get advantage in her lane its all bad for the other team. With her abilities she can push towers very hard and take them down in no time. Fiora is a very good champ to pick if the other team is squishy because she does so much damage in a matter of seconds. Its always good to ban Jax/Malphite because those are the only champs that can really counter Fiora.

Always make sure your either the first pick or one of the lasts so they can't counter Fiora. Always play smart and safe or else you will get dominated in ranked. If the enemy is half health and not a lot of minions around just combo Q+W+E then if they start to run use Q to catch up and ignite them to secure the kill. If your ever in danger don't be afraid to use flash because once Fiora is slowed by the enemy team its a kill for them.