Wukong vs Mordekaiser

Engage with Nimbus Strike (E), then Crushing Blow (Q): the dash gives you attack speed, and Crushing Blow shreds your target's armor before your Cyclone (R).

Stay in close when you fight: Stone Skin (passive) increases your armor and health regen as long as you're fighting champions or monsters.

Cast Warrior Trickster (W) to escape or dodge a key spell: you dash and turn invisible for a moment, and your clone stays in place to fool the enemy.

Recast Cyclone (R) right after the first: the spell can be cast twice, and each spin knocks nearby enemies into the air again.

Stay near your minions against Obliterate (Q): its damage increases when it hits only one enemy.

Dodge Death's Grasp (E): it pulls you toward him, into his other spells, and it has a 16 to 8 second cooldown.

If you have range, kite him: Mordekaiser has no dash, and only Death's Grasp (E), which pulls you in, closes the distance.

In Realm of Death (R), save your mobility spells to escape him rather than for the duel: he steals part of your stats, and keeps them if he kills you.