“Depends a lot on Ahri's E if you're good at dodging it better than Ahri is at hitting it you should win this. When you're looking to trade an Ahri always move around left right etc(for her charm), never go in without trying to dodge. You could use the minions to your advantage when you go in so she can't hit her E as easly. Mercs is really good vs Ahri if they have other cc's aswell.”
“A decently good Ahri, when fed, can swing this quite hard in her favour because of her mobility and one-shot potential, but you definitely have the upper hand early game with your push potential, she uses a lot more mana than you early on. If she takes Cleanse her kill pressure on you will be greatly reduced as she doesn't have much damage unless she snowballs. Remember that without her ult she is the same as any other squishy immobile mage, she can be burst down really easily. Definitely DO NOT Portal Jump in front of her because it guarantees her Charm, and more than likely a free kill on you.”
“Skill Match-up that favors her very slightly. After she gets her ulti, she is almost impossible to kill, unless she uses all 3 charges offensively. In that case, wait her out and use your combo. It's also important that you dodge her charm, as it makes it easy for her to land all of her abilities.”
“More of skill matchup. Don't get hit by charms and you should be ok.”
“Pre 6 you can all-in her whenever her charm is on CD. If you can bait it, she has no way of trading back. After level 6 you should be a bit more careful and stay behind minions when fighting. If you can land miasma on her she won't be able to dash or flash. ”
“Start Doran + 2 Pots if 1) You think you can outplay her and hit your W's to generate a kill at levels 3-5 or 2) You think she will burst you down post 6 (get an extra ring).
Start Corrupting if you think you will not hit your W's (or you will get poked down) and you rely more on wave clear/spammy poke (you will be way more squisher but more durable -- this is recommended if you are sure you will not get hit by CC spells and instantly die).
All you have to do is to dodge her
E pre 6 in order to kill her. Play with Cleanse if you think their jungler will reach you if she hits you and post 6 play careful because of her ult. In this matchup I usually push hard till level 2 and then try to keep a steady push so her Qs will be forced on minions and not on me. Never get hit by a Q that it is intended for minions. Try to learn her E pattern in the first 4 minutes and you will have an easy game. Be careful of the instant E->Flash combo -- if you don't play with cleanse OR if you don't react fast enough she will kill you, however I suspect very few Ahri players are able to do it on a consistent basis so you will be generally OK with Ignite too. Play with Cleanse only if you cannot dodge CC spells easily OR they have a setup for her (Seju/Amumu/Zac/whatever).”
“An Ahri player who knows what she is doing can be dangerous but generally this lane is easy with Grasp or Fleet. In lane you want to bait out her Q and then approach to use your own Q.”
“Charms hurt, but if you stay behind minions you're almost always going to be able to poke safely”
“Skillmatchup depending on if you can dodge or bait her skillshots. She has the upper hand early since her pushing ability is higher and her rune setup is often electrocute/glacial augment. Remember that her returning Q deals true damage. You probably will fight for lanepriority and roam potential in this lane. After level 6 she has the upper hand till well into midgame, since she actually gets an useful ultimate, so be careful.”
“Rush mercs in this matchups and try to dodge her spells. ”