Malphite vs Yasuo

Save Unstoppable Force (R) for when the enemy carries are grouped: nothing stops your charge, and the impact knocks every enemy in the area into the air.

Cast Seismic Shard (Q) before engaging or to escape: it slows the target and gives you the speed it steals.

Take your trades while Granite Shield (passive) is up: it absorbs 10% of your max health, and Thunderclap (W) then triples your bonus armor.

Against a champion who lives on autos, start your trades with Ground Slam (E): it lowers their attack speed, and its damage scales with your armor.

Hit him with a cheap attack to trigger the Way of the Wanderer (passive) shield, then start the real trade: otherwise, it absorbs your best damage.

If you have projectiles, save them for after Wind Wall (W): it blocks them all for 4 seconds, on a 25 to 17 second cooldown. Other spells go through it.

Don't stand right behind your minions: each one gives him a target for Sweeping Blade (E), and he gets closer to you with every dash.

Get out of the line of his whirlwind, the third Steel Tempest (Q): without a knock-up, he can't cast Last Breath (R).

Judge his threat by his crit items more than his level: Way of the Wanderer (passive) raises his critical strike chance, so each crit item does more for him.