The Bluebirds produced a five-star performance in their under-18 pre-season match against Southampton at Staplewood Campus.
The Saints have one of the most acclaimed youth academies in Britain, but their under-18 team could not contain rampant Cardiff City.
Isaak Davies (2), Joel Bagan, Ryan Kavanagh and Rubin Colwill were the City goalscorers.
Goalkeeper Jamie Cogman, a 16-year-old from the Gold Coast in Australia, kept a clean sheet. Former Brisbane City player Cogman was brought to Wales by former Swansea City and Leeds United goalkeeper Glad Letheren, who runs Topcatchgk coaching.
Davies, aged 17 and under contract until next summer, scored twice for Cardiff and continues to impress for the under-18 team.
The former Aberdare Town Church in Wales Primary School pupil has been with Cardiff’s Academy since he was seven-years-old.
Davies, an agile, quick and aggressive centre-forward, was spotted by club scout John O’Sullivan when he was five and playing for local club Cwmbach Royal Stars.
“Isaak is a good player, a talented lad,” said scout O’Sullivan. “He could go a long way in my opinion because he loves the game and has the right attitude, which is half the battle.
“He’s a goalscorer, pretty quick and has a bit of everything.”
Cardiff City: Jamie Cogman, Taylor Jones, Sam Parsons, Joel Bagan, Harry Pinchard, Tom Chiabi, Ntazana Mayembe, Rubin Colwill, Ryan Kavanagh, Kieron Evans, Isaak Davies. Subs: Joshua Rippon, Jenkins, Owen Pritchard, Siyabonga Ligendza, Rhys Schwank.