A serious looking injury for Brad Barritt was a downside for Saracens after their 26-17 victory away to Wasps in Coventry.
Barritt's foot was trapped under Wasps fly-half Andy Goode after both fell to the ground from jumping for a high ball.
The Saracens centre received lengthy treatment but did not require a stretcher to get off the field, although on initial viewing it looked like a serious blow.
Barritt has been tipped to start for England this weekend in the Calcutta Cup clash against Scotland.
"We are hopeful it isn't too serious and we have our fingers crossed because Brad must be very close to England selection next week," said Saracens boss Mark McCall.
McCall was pleased with his side's resilience after going down to two exceptional tries by Wasps backs Christian Wade and Elliot Daly.
"We had the clarity of thought not to be spooked when they scored two tries in three minutes as we put the ball in the right areas to put pressure on them," he said.
"You can see that they have people who can hurt you from long range as they've scored a lot of tries from inside their own half this season.
"We had chances to close it up late on, which we didn't take, but we did deprive them of a vital bonus point."
Wasps director of rugby Dai Young meanwhile was left frustrated by the way Saracens squeezed his side out of the contest after they had opened up a considerable lead.
"We knew what was coming from (them) as they don't play a lot of rugby, (they) kick the ball a lot to squeeze you and it's very hard to play against," said Young.
"If you can control it, you get options to play as we showed in the first 20 minutes but after that we struggled to deal with the aerial bombardment as we dropped the ball far too often.
"Nothing changes as a result of today, we are still a work in progress and we are still aiming for a place in the top six.
"We will address what went wrong today for our set-piece didn't function as well as we would have liked and we lacked a bit of control in the second half. However, we do have individual players who can lighten up any stadium as you saw in the first 20 minutes."