Who would win: Dilophosaurus vs. Boa constrictor

A Dilophosaurus is suddenly teleported to the Amazon Rainforest, where it comes across an Anaconda. Upon seeing each other, both animals become bloodlusted and they fight.

Can a prehistoric reptile bring down a snake?

This battle has three rounds:

• Round 1: Dilophosaurus (Jurassic Park) vs. Anaconda. A juvenile Dilo (JP lore indicates they were about 10 feet (3 meters) long).
• Round 2: An adult Dilophosaurus (Jurassic Park) fights the Anaconda. According to JP canon, the adult Dilo is roughly 20 feet.
• Round 3: The scientifically accurate (and much larger) Dilophosaurus throws down with the Anaconda. Unlike its JP counterpart, the scientifically accurate Dilo was Up to 25 feet long and weighed approximately 880 to 1,500 pounds. He also has a height of about 8 feet at the hips.

All 3 rounds take place on the banks of the Amazon River.

Win conditions: This is a battle to the death. To win, one combatant must kill the other (The winner doesn't have to actually EAT the defeated combatant but is allowed to).