London - Wales back row Taulupe Faletau is likely to miss the November internationals after suffering a broken arm during Bath's Premiership clash with Exeter.
Bath have yet to give a timeframe for Faletau's recovery, but the 27-year-old is set to be sidelined for several weeks.
That would make it a race against time to feature for Wales when they face Scotland, Australia, Tonga and South Africa in November.
It is also a blow for Bath, who kick off their European Champions Cup campaign against Toulouse on Saturday.
Bath face Wasps in the Champions Cup this month before they resume Premiership action by tackling Worcester on November 17.
"Bath Rugby can confirm that Taulupe Faletau broke his arm during last week's Gallagher Premiership fixture against Exeter Chiefs. We wish him a speedy recovery," a statement on the club's website read.
Wales head coach Warren Gatland will name his Test squad early next week and the potential loss of Faletau, who has 72 caps and started all three Tests for the British and Irish Lions against New Zealand last year, would be a significant setback.