Cardiff won 22-19 against Glasgow at Hughenden last night to keep up their bid to win the Welsh/Scottish League.
With three matches remaining, they are two points behind Neath and Llanelli, though they have a game in hand over leaders, Neath.
Cardiff took an early lead in Glasgow when centre Matt Allen scored a try and three Nicky Robinson penalties took them ahead by 14-6 at the interval.
In the second half, wing Nick Walne scored a try and Robinson landed his fourth penalty to make it 22-9, but a late Glasgow rally brought them ten points, including a try by replacement scrum half Kenny Sinclair.
The top three positions are now: -
P W D L For Agst Tries Pts
Neath 18 13 0 5 553 332 58 39
Llanelli 17 13 0 4 493 331 46 39
Cardiff 17 12 1 4 406 325 46 37
The remaining matches for the three clubs are: -
Neath: May 3 v Pontypridd (h); May 8 v Swansea (a).
Llanelli: May 3 v Edinburgh (a); May 7 v Caerphilly (a); May 10 v Cardiff (a).
Cardiff: May 4 v Swansea (a); May 7 v Bridgend (h); May 10 v Llanelli (h).
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.