Warwick vs Cho'Gath

Hold Jaws of the Beast (Q) to latch onto your target: you follow all their movement, dashes included, then leap behind them.

Cast Primal Howl (E) in the middle of the fight: you take less damage, then the howl fears nearby enemies. Recast it to fear sooner.

Cast Infinite Duress (R) on their carry: you suppress the first champion hit and heal for all the damage dealt. Your move speed lengthens the leap.

Follow the Blood Hunt (W) trails: you sense champions below 50% health and gain speed toward them, three times more below 25%.

Keep moving against him: Rupture (Q) strikes an area on the ground, and an enemy standing still takes a knock-up, damage and a slow.

Punish him when he goes for last hits: Carnivore (passive) restores health and mana for each unit he kills, and he lasts a long time in lane if you let him farm.

If you have range, keep your distance: his kit has no dash, only the slows from Rupture (Q) and Vorpal Spikes (E).

Don't stay in melee range at low health when Feast (R) is up: its true damage ignores your resistances, even if you're a tank.