Wales centre Jamie Roberts has been left out of the Racing Metro squad for Saturday's European Champions Cup clash at Ospreys.
Fellow Wales internationals Luke Charteris and Mike Phillips have been included in the French club's 27-man party.
Lock Charteris says it will be "good fun" to line up against some of his Wales team-mates.
"There's been a bit of banter flying around between us," said Charteris.
"I kept trying to trick the Ospreys boys into slipping a few of their line-out calls, but they've all been on guard unfortunately," he said.
Ospreys are third in Pool 5 of the European Champions Cup after two matches, having won one and lost one.
Victory on Saturday could see them overtake their Paris-based opponents at the top of the table.
Charteris told BBC Wales Sport he expects it to be a difficult match.
"I think the Ospreys are a younger team this year," said Charteris, "and when you look at them on paper there's probably not as many big names.
"But a lot of those boys have been there for years and have tasted the success the Ospreys have had.
"They've bided their time and now these boys are playing regularly and they look really good and impressive.
"I've seen a few of their games in the Pro12 and they are probably the form team in that competition, so it's going to be a tough game on Saturday."
Ospreys hooker Scott Baldwin played all 80 minutes as Wales beat South Africa 12-6 in their final November Test.
Despite their gruelling autumn international campaign, Baldwin is eager to be involved against the French side at the Liberty Stadium.
"I'm just really excited about the weekend now," said the front rower.
"I'm really looking forward to going out to what will be a real big physical challenge again."
Baldwin believes the loss against the Saints was a one-off.
"Obviously we had the blip against Northampton, but there were big positives in that game," said the 26-year-old.
"I thought our scrum went really well and our line-outs have been going well all season.
"It's just about building on the positives this weekend and just tweaking things that maybe haven't been going right."