Saracens are sweating over the fitness of Owen Farrell, who suffered a foot injury in the 28-24 win over Northampton Saints.
Farrell was forced of after sustaining the damage, with the extent of the problem not yet clear.
"It's too early to say about Owen," said boss Mark McCall.
"It's a foot injury and you never know with foot injuries. Owen doesn't remember when it happened. We'll have news later in the week. He couldn't kick with it."
The director of rugby was, however, delighted with the win that strengthened his side's grip on first place in the Premiership, with Saints still their closest rivals.
"I was chuffed with how we played. It was a good as we've played all season, we were hard to handle at times today," said McCall.
"What I enjoyed was the intent we had in everything we did today. Intent to counter attack, intent to carry the ball, intent to chase kicks, intent in defence - I thought we really good today.
"This is where we want to be for a semi-final, so to play like that at Allianz Park was very important.
"We're that one step closer to get there (to home semi-final qualification), so we are as close as we can be and that will give the players a huge amount of confidence. I will ignore that last ten minutes to be honest, because what happened before that was brilliant."