Sarissas and a phalanx' front line

[Dutchhoplite]

And many people think a Phalangite without the Phalanx is helpless, but the 60 cm shield and a 30cm sword makes for a good dueling combination, especially for proffesional soldiers like the Pezhetairoi.

Nope, a phalangite would be hopelessly outclassed in a duel. His equipment and training just wasn't suited for one on one combat.