Connacht managed a rare win over Munster and Scarlets defeated Ospreys in the United Rugby Championship.
Wales' four regional clubs are bracing for more financial pain with the impeding return of Covid-19 crowd restrictions.
Sporting events in Wales will be played behind closed doors from Boxing Day in a bid to combat the spread of the Omicron variant.
A try by Jack O'Donoghue, as well as 14 points via the boot of Ben Healy, saw Munster rack up a 19-13 Champions Cup win over Castres.
Bath have confirmed Johann van Graan will replace Neal Hatley as head coach at the end of the season.
Munster head coach Johann van Graan will leave the province at the end of the season after turning down a two-year contract extension.
Dai Young has pleaded for government intervention to assist the Cardiff personnel facing a second period of quarantine after returning from South Africa.
Cardiff have begun repatriating their six remaining squad and staff members from South Africa, but they face a second 10-day period of isolation in the UK.
Ospreys player Ifan Phillips is being treated for "life-changing injuries" after he was involved in a road traffic collision.
Recap Saturday's United Rugby Championship action as the Ospreys beat Ulster and the Lions beat the Stormers in South Africa.
Recap Friday's United Rugby Championship action as Leinster, Edinburgh and the Sharks pick up wins over Connacht, Benetton and the Bulls.
Dai Young said Cardiff will "do everything in our power" to play their Heineken Champions Cup games against Toulouse and Harlequins.
Cardiff are set to return to the UK on Thursday having been stranded in South Africa after the cancellation of their matches in the United Rugby Championship.
Duane Vermeulen's debut for Ulster has been further delayed after the South Africa No 8 tested positive for Covid-19.
Munster have recorded nine new positive Covid-19 cases among their group of players and staff in South Africa.
Cardiff and Munster are to remain in Cape Town after both clubs returned positive coronavirus tests.
Recap Saturday's United Rugby Championship action as Ulster won at Leinster, Benetton beat Glasgow and Edinburgh won at the Dragons.
Connacht's approach at a wind and rain-lashed Sportsground was rewarded with a 46-18 bonus-point win over the Ospreys.
Cardiff and the Scarlets say they are struggling to fly their teams back from South Africa despite securing a charter plane.
Ireland's Johnny Sexton has been ruled out for up to six weeks after being forced off injured during Saturday's 29-20 win over New Zealand.
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