Territorial Big-Eyed Tree Frog?

Hey gang. So, my girlfriend has a year or so old big-eyed (peacock) tree frog, aptly named Frogger. Frogger is in a 29 gallon tank with plenty of stuff to hide in and climb on, but spends most of his time either hanging out in one of the two small ponds or tucked on the wall up in his corner.

Yesterday, my girlfriend got another big-eyed tree frog and added it to the tank. During the day, all was quiet, with both frogs just sleeping on opposite sides of the tank. However, after the lights switched over and night came, they both emerged (of course). At first it seemed like they were just checking each other out, with the new frog being extremely chill compared to Frogger, who was at least moving around the tank and hopping from one wall to another. After a while, Frogger began croaking at the new frog, and then started jumping at it. I never saw him actually attack the new frog, but he did seem to keep jumping close to it and around it. After a while, it seemed like Frogger calmed down. He wasn't puffed up any longer, and he began to croak far less, until he stopped all together. When I got up this morning, he was headed to his corner, and the new frog was tucked in toward the back of the tank, everybody looked fine.

Now, going off the wiki entry for these frogs: "Males call while in the water, and are very territorial."

I think the new frog may be a female, but I'm only basing that on the fact that she is a bit larger than Frogger is. Noticeably larger, but not huge by comparison. While Frogger was darting around and mouthing off, she basically just sat there and/or moved away from him. She appears to be a very chill frog.

So, my question is, can anyone think of any reason for concern here? I kind of assumed there would be some level of asserting dominance, but Frogger really seemed upset for a while and now the girlfriend is a little worried they may hurt each other. I'm anxious to see how they behave tonight.