England head coach Stuart Lancaster has appeared to call into question the fitness of flanker Steffon Armitage.
Speaking in defence of England captain Chris Robshaw, Lancaster addressed the calls from both the public and the media for Armitage to be included back into the set-up by questioning whether he was fit enough to handle Test rugby.
"I want our players to stay in England and play in England," said Lancaster to the press on Monday.
"At Toulon he [Armitage] plays behind a dominant pack and they have got world-class players in every position. They are beating everyone on the front foot.
"To play for 80 minutes, at the highest level in Test rugby, when you're not on the front foot and have to keep running around at high levels of intensity, you've got to be fit."
Armitage was named on Monday as the best foreign player in the Top 14 by Midi Olympique, having excelled last season as Toulon reached both the Amlin Challenge Cup and Top 14 Finals.
England came unstuck against Australia's Michael Hooper last Saturday, raising the issue once again on whether a recognised "fetcher" is needed at openside flanker rather than England captain Robshaw.
The Harlequins captain produced more turnovers than any other player during the June series against South Africa, but appears more physically suited to the blindside flank.
"Chris has been named captain for the series and I'm more than happy with his contribution on and off the field. I don't see that Chris' performance would warrant being dropped," added Lancaster.
"There are not many in my opinion who play at seven in England in the same way as Michael Hooper or Richie McCaw do. It's quite hard to magic someone up to play in that way in our competition."