As sion, Do not play near lane brushes in this matchup. Sion can easily CC you for a long time and you will get burst down.

Try to stay mobile in this matchup as Sion's weakness is dealing with mobile enemies. Also, CC him at the right time to interrupt his Q.

Lookout for his ultimate in this matchup. If he goes to some other lane, it is time to shove the wave and get a few turret plates.

Keep the wave close to your tower. The enemy has no sort of sieging potential and can be easily exposed to ganks. As sion, Don't play near the lane brushes in this matchup. Sion can easily you CC for a long time and you will get burst. Try to stay mobile in this matchup because Zion's weakness is to deal with moving enemies. Also, CC him at the right time to interrupt his Q. Look for his ultimate in this matchup. If he goes to another way, it's time to push the wave and get some turret plates. Keep the wave near your turn. The enemy doesn't have some kind of nap potential and can easily be exposed to the ganks.