Something must give at Narberth tomorrow evening when the two unbeaten sides in the WRU Age Grade under 20 Championship meet head on in Narberth.
The Scarlets, who were deserved 24-7 winners at the Ospreys in their opening game of this season's competition, will be looking to use home advantage when they meet the Dragons.
The visitors kicked off their season with a 13-12 home success against the Blues, but will find this an altogether tougher assignment, in west Wales.
The other game sees the Ospreys travel to Glamorgan Wanderers to face the Blues.
Scott Andrews, who scored one of the Blues' consolation tries last week, starts as captain, whilst in the Dragons' side, senior full back Jason Tovey is included.
Cardiff Blues: J Loxton; L Fear, H Allen, D Gunter, R Healey; J Murphy, G Lucas; T Price, R Williams, S Andrews (capt), N Huntley, D Partridge, K Dacey, J Thomas, B Morgan. Replacements: M Howells, B Lee, J Navidi, S Studley, T Rowlands, R Locke, J Deacon
Scarlets: D Newton; J Davies, S Soul, S Williams, N Davies; D Etteridge, T James (capt); O Evans, L Lewis, S Gardner, J Davey, S Jones, E Lloyd, J Davies, R Decapenter.
Replacements: A Howells, G Flynn, L Kendall, H Boot, G Davies, N Reynolds, M Evans
Dragons: J Tovey; O Halford, A Hughes, M Pewtner, N Preece; D Langdon, D Jones; D Watchurst, C Fillier, S Maguire, S Pailor, A Sweet (capt), M Allen, R Jenkins, J Thomas. Replacements: A Coundley. R Price, L Bray, T Falatau, C Davies, I Coombs, T Driver
The WRU has teamed up with Crawshay's to tour Georgia in June. The side, which will be called the Crawshays WRU President's XV, will play Emerging Georgia twice, in a tour which supports the Welsh Government's efforts to grow relations between the two countries.
Wales Sevens are looking to re-group after a disappointing tournament last time out in South Africa. The next double leg in New Zealand and Las Vegas offers Gareth Williams a chance to redeem themselves.
Wales Women's head coach Rhys Edwards was at Llandovery to see the conclusion of an entertaining Women's Regional championship where any one of three teams were in contention for title glory on the last day of action.