Unlike Konjuh, Djere had something to prove to himself in the final. At the Eddie Herr, he was unable to close out Christian Garin of Chile in the final, despite a 6-0, 4-1 lead, so he was determined to seize his chances against Ymer.
"It would be a bad feeling to lose two finals," said the 17-year-old right-hander. "I give my best to win this final."
Djere, who had beaten Ymer in the Eddie Herr semifinals, took advantage of Ymer's inexperience serving a 4-5 in both sets.
In the first set, with Ymer serving at 4-5, 30-30, Djere hit a forehand on the line to give himself set point. He controlled that point, standing much nearer the baseline than Ymer, and when he got a weak reply on one of his ground strokes, he approached the net and put away the forehand volley.
The second set saw neither server surrendering so much as a single break point until Ymer again was forced to serve down 4-5. Two unforced errors and a return winner quickly put Djere at match point. He didn't convert the first, but drew another error from Ymer on the second to claim the Orange Bowl championship.
"I was just so focused at that moment," said Djere, who will leave Monday to return to Serbia for the holidays.
"I knew that I have to win in two sets, because the third set would be really tough. It's so hard to breathe, it was the hottest day, and I was not really prepared for this conditions, but it was the same for him. I did it better today."
Ymer detected some fatigue in Djere by late in the second set, and even earlier both boys were conceding drop shots and not running down overheads or volleys.
"In the second set, 4-all, we were both I think very tired," said the 16-year-old Ymer, who was given a warning for racquet abuse in that game. "Maybe that's why I showed some emotion."
Ymer's forehand is smooth and powerful, and his two-handed backhand is solid, but he felt those shots were trumped by Djere. "His backhand is for sure better," said Ymer, who thought Djere played smarter than he did when it mattered. "It's been two pretty good weeks--semis at Eddie Herr and finals at Orange Bowl. I hope I can next year come again."
Djere is unlikely to return, although he is planning on playing the junior slams as well as Futures and Challengers qualifying in 2013. Like Konjuh, rest at home is on his to-do list, although he said the adrenaline immediately following the match kept him from feeling any fatigue.
"I'm very happy and excited," said Djere. "Right now I don't feel that I'm tired, but after a few hours, I will be tired."
Djere's longtime coach, Miklos Palagi, said he knew Djere would come through this time in the final, because he had learned from his experience at the Eddie Herr.
"When you are a set and 4-1 up, you just play," said Palagi. "You relax and just play, don't think about the score, the title. Just play, just play, just play. When I saw his footwork today, I knew he would make it."