Udyr

Don't invade him

Kha'Zix

Kha'Zix is really easy to beat 1v1 early if you meditate his Q. Use your Q when he tries to jump away. After level 6 avoid him unless you are really ahead / his ult is on cooldown. You outscale him. Ward your jungle and be careful of invades.

Elise

Very hard to win a duel against her unless you manage to catch her by surprise. Dodge her Human form E. Ward your jungle as she will probably invade you early.

Rek'Sai

She can abuse you pretty hard in the early game. Ward your jungle.

Rammus

Just buy qss

Evelynn

Invade her early

Rengar

Depends on how good the Rengar player is. Use Meditate on his burst. Ward your jungle

Nocturne

Strong early game, in 1v1 dodge his ult / use your Q to reduce the fear duration

Shaco

Annoying

Warwick

He wins early 1v1 fights because of his healing. If he hits you with his R you are pretty much dead unless there is someone to help you

Graves

Fiddlesticks

One shot and fear

Ivern

Annoying

Skarner

He can 1v1 you early, but you outscale him. Get qss, you can also get tenacity in your runes against him.

Vi

Her R is annoying

Volibear

Easy to beat in 1v1's but his Q being a point and click cc ability is annoying during fights

Lee Sin

Lee is easy to beat early game but if he is ahead/goes lethality and you are even with him he can just burst you down with his combo

Olaf

His Lifesteal is op

Amumu

Pretty annoying with his cc chain

Nidalee

Watch out for her invades and be careful of her heavy burst.

Hecarim

Dodge his E in 1v1 situations Dodge his R in teamfights

Jarvan IV

Really easy to beat in 1v1 situations. You can Q his ult damage

Sejuani

Not hard to beat in 1v1 situations, but can be tricky in Teamfights. Dodge her jump/R.

Kayn

Really easy to beat

Xin Zhao

Zac

Not hard to beat in 1v1 situations, but can be pretty annoying in Teamfights.

Nunu & Willump

Easy to beat in 1v1 situations, but you should look for invades. If you want to afk farm against him you will most likely lose because of his early game gank potential

Trundle

Really hard to duel him until you get to late game

Shyvana

You outfarm and outscale her

Kindred

If she uses her R, you can auto attack her so you will get your Q back up (if it's on cooldown), and Q her (or her teammates) once her R is down. Invade her as much as possible early.

Lillia

You are able to always beat her in 1v1 as long as she doesn't have her q stacks up. Invade her as she is weak to early invades. You can dodge her sleep with your Q so be sure to time it right.

Karthus

Just invade him and meditate his R in late game

Twitch

Invade him early, try to abuse him as much as possible as he doesn't really have a way to survive. (+ he will lose the will to play the game)

Qiyana

Just ban it got nothing more to say about this champion.