Josh Norton’s second-half double left Portadown with full points from the weekend NIFL Youth League test against St Oliver Plunkett.
The thirds had to match the physical test before gaining control thanks to Norton’s brace.
Both goals arrived after a tactical switch pushed Norton into a central striker’s role and introduced Ryan McKeown off the bench.
PORTADOWN THIRDS: Stefan Graham, Robbie Hutchinson, Marcus Smylie, Mark Whitten, Daniel Hume, Joel Adams, Jacob Taylor, Chris Ferguson, Peter Campbell, Marcio Soares, Josh Norton. Subs: Ryan McKeown, Jay Ludlow, Craig Baird.
The third face Dungannon Swifts at Kernan tomorrow (Saturday) from 10.30 in the NIFL League Cup.
The Mid-Ulster Youth Cup semi-final against Glenavon has been switched from February 28, with a date to be confirmed.