Udyr

d0g champ

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 from u.
After level 6 avoid fighting him 1v1 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
Annoying mid/late game

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

Graves

Fiddlesticks

One shot and fear

Ivern

Annoying

Skarner

Annoying

Vi

Annoying

Volibear

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

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

op champion

Amumu

Annoying

Nidalee

Annoying

Hecarim

Dodge his R with Q in teamfights

Jarvan IV

Really easy to beat in 1v1 situations.
Q his knock-up combo

Sejuani

Not hard to beat in 1v1 situations. Q her ult

Kayn

Really easy to beat if red kayn
Annoying if blue kayn

Xin Zhao

Zac

Annoying

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

Annoying

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

Lillia

You are able to always beat her in 1v1 as long as she doesn't have her q stacks up.
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 like a wife that used too much salt for the soup, as he doesn't really have a way to survive. (+ he will lose the will to play the game)

Qiyana

Annoying

Wukong

Annoying