Blues North and South will be looking to stay on course for a place in the final of the WRU Age Grade Championship tomorrow (Tuesday 25 November) when they take on the Dragons and the Ospreys.
The North have lost their last two games, but are still in with a good chance of qualifying whilst the South's defeat of the North last time out, has kept them in the hunt too.
The South entertain a Dragons side who went down to North Wales last week, but who will provide stern opposition at Taffs Well. Tries from Matt Roberts and JB Bruziller earned the South a 21-6 victory over the Dragons two months ago with Rhys Patchell helping himself to 11 points.
Meanwhile the Ospreys, who were 22-14 winners over the Dragons in their last game, will be no pushovers for a North side who were 46-27 winners when the sides met earlier in the season.
Victory for the home side is a must if they are to keep alive their feint hopes of reaching the final, whilst for the North, a sixth victory of the season would put them in with a wonderful chance of another final appearance.
On Wednesday, it's the turn of the under 18s with the Dragons taking on the Ospreys at Newbridge.
Cardiff Blues u-16 South: C Allen; H Robinson, C Driscoll, J Morris, M Roberts; R Patchell, T O'Brien; R Rowley, P Lloyd, A Rees, E Chilcott, I Matthews, S Vial, L O'Brien, R Tucker (capt). Replacements: J Hopkins, C Hole, B Smith, J Delf, R Phillips, JB Bruzillier, P King
Tuesday - Under 16
Blues South v Dragons (Taffs Well 7.15)
Ospreys v Blues North (Llandarcy 7.15)
Wednesday - Under 18
Dragons v Ospreys (Newbridge 7.15)
Existing Season Ticket holders are advised that full details of all packages for the 2015/16 season have now been posted out to you and will arrive in the coming days - and that the deadline to renew your seat has now been extended!
Supporters are advised that Cardiff Blues will be holding a presentation on the field post match on Saturday afternoon to mark those players leaving the region, hand out caps and the end of season awards.
First team stars Cory Allen, Ellis Jenkins, Adam Jones and Kristian Dacey were among the special guests as Cardiff Blues held the Sphere Solutions Blues Tag Rugby Festival at BT Sport Cardiff Arms Park.
The players at Cardiff Blues will be hoping to play with some true Gallic flair for the rest of the Guinness PRO12 season - after the region teamed up with a successful French bistrot in the Welsh capital.
Cardiff Blues will be celebrating St David's Day when the region faces Edinburgh Rugby at BT Sport Cardiff Arms Park on Sunday afternoon (kick-off 12.45pm) - with hundreds of children invited as part of our Regional Schools Day.