Entry is open to the under 12s, under 14s, under 16s and under 18s.
Titles will be settled in singles and doubles - with opening fixtures planned to start on Monday.
“Everyone is welcome to pop down and have a look at some exciting young players.” said Portadown Tennis Club chairman Lyn Jamison. “It is an honour for us to, once again, host the tournament,
“We will make the draw this weekend, with fixtures proposed every day next week.”
At club level, Portadown have reached the men’s Knockout Cup semi-final thanks to wins over Bangor and Downpatrick.