Eight Cardiff Blues players were involved across three international fixtures over the weekend, as two regional team-mates clash in Basque.
Wales 9 Australia 6
Gareth Anscombe retained the Wales number 10 jersey as Warren Gatland's side looked to end a 13-match losing streak against Australia.
The outside half was called into defensive action early on, making a try-saving tackle, and dislodging the ball, as Wallabies centre, Samu Kerevi, seemed destined for the whitewash.
The result came down to a kicking battle between Leigh Halfpenny and Dan Biggar and their Australian counterparts, Bernard Foley and Matt Toomua, with Biggar's 77th minute penalty sealing the win for the hosts.
From the bench, replacements Dillon Lewis, Ellis Jenkins and Tomos Williams all made impact in the late stages.
Gatland's side move on to face Tonga at Principality Stadium next week, before the final autumn showdown against South Africa.
Wales Women 19 South Africa Women 5
Wales Women got their autumn campaign underway with a stunning victory over South Africa at the Cardiff Arms Park.
Jaz Joyce and Sioned Harries crossed the whitewash in the first half, as Cardiff Blues' Robyn Wilkins also added a conversion to extend her side's lead.
Cardiff Blues Community Foundation's girls rugby officer, Alisha Butchers, was forced off early with an injury, allowing Ysgol Gyfun Glantaf back row, Manon Johnes, an opportunity to make her international debut at just 17-years-old.
Captain Carys Phillips sealed the victory for the home side, who will host Hong Kong at CAP on Friday, 16 November (KO 7.00pm)
USA 30 Samoa 29
Cardiff Blues duo, Blaine Scully and Rey Lee-Lo, were on opposing sides as USA and Samoa took part in a dramatic Test match in San Sebastian.
Former Cardiff Blues back row, Cam Dolan, was amongst the scorers, as he grabbed two of the Eagles' four tries on the night.
Scully captained the USA to their first ever victory over Samoa, thanks to Will Hooley's last gasp penalty, as the Eagles maintained their undefeated streak this year.