The 29-year-old missed Real's recent UEFA Champions League clash with CSKA Moscow, which they lost 1-0 away from home, due to injury, and also limped off the field in their 1-0 loss to Alaves in the league last weekend, leading Real to believe he would not be joining up with Wales in the worldwide break.
The problem is not deemed to be serious and did not prevent him from joining up with the rest of the Wales squad.
But Wales boss Giggs is still hopeful that Bale will make the Nations League tie away to the Ireland on Tuesday, and predicted that he would be fit for Real's next game against Levante. "We don't want to take any risks and we are monitoring it every day".
Real Madrid are running out of patience with Gareth Bale, according to reports in Spain. I would say he is 50-50 at the minute for the Ireland game'.
We are expecting Enrique to stick with his favoured 4-3-3 formation, but give several fringe players an opportunity to shine with many first team regulars saved for the England clash.
"There was a little bit on both scans - but there's always something. We'll miss him, we hope he's available for as many games as possible", the Stoke City defender explained.
"I don't think I was ever 100 per cent [fit] when playing". When you have niggling injuries, it's maybe at the back of your mind until you're flying again, but I'm not anxious and Gareth isn't anxious.
"The Wales that we have analysed is one with Bale", Luis Enrique said in Wednesday's news conference at the Principality Stadium.