England pair Marcus Smith and Alex Mitchell to join up with the rest of the squad on a three-day Six Nations training camp to continue rehabilitating their injuries.
Marcus Smith has been ruled out of England's Six Nations opener against Italy in Rome due to a calf injury, coach Kevin Sinfield has confirmed.
Jarrod Evans' missed conversion with the last kick of the game saw Harlequins edged out 20-19 by Leicester on Friday.
Harlequins produced a 47-19 win over Ulster that keeps them in the chase for home advantage in the Champions Cup knockouts, and leaves Ulster out.
Rounding up a busy Saturday with eight matches in the Champions Cup as Harlequins thump Cardiff and Exeter progress, but Sale and Bristol lose.
Harlequins moved to the top of the Premiership with a bonus-point win over Newcastle, while Bristol ended Sales' long winning home run.
Harlequins prop Joe Marler's arm injury is being assessed by specialists amid front-row concerns for England ahead of the Six Nations.
Northampton mounted a stunning fightback to beat Sale 21-17 and moved to the top of the Gallagher Premiership table with a sixth successive victory.