Wigglesworth: Potential knee injury

But Injuries to Wigglesworth and England Under-20 No. 8 Jackson Wray, who left the ground on crutches, could not take the gloss off Sarries' 43-20 home victory over Exeter in the LV= Cup.

Paul Gustard, the Saracens defence and forwards coach, said: "We don't know the extent of the injuries just yet but we'll get them scanned and assess them tomorrow."

Saracens had already lost England prop Matt Stevens, ruled out with a sore back after being named on the replacements' bench for his first outing back from the World Cup.

"Matt wanted to play this game but unfortunately had to withdraw," added Gustard, who praised his side for the way they bounced back after losing 36-6 at Northampton in their opening group match a week earlier.

He said: "Our performance last week wasn't up to the standards we normally set ourselves. We let ourselves down in certain areas.

"But today all 23 players, including some in positions they don't normally play, dealt with adversity really well."

England Under-20 fly-half Owen Farrell, who contributed 28 points with a try, five penalties and four conversions, and replacement scrum-half Ben Spencer, who took over from Wigglesworth, were both praised by Gustard.

He said: "Both half-backs did well. Spencer will surely be knocking on the door for England 20s this year."

Farrell is the son of dual-code England international Andy Farrell, also on the Sarries' coaching staff, and Gustard said "Owen has got a lot of inner drive.

"He comes from pretty good stock himself, of course, and he's very competitive. Last year he played 18 or 19 games on the spin, took us to the Premiership final and won us the final so we know what he can do."

Exeter head coach Rob Baxter, who has rung the changes for the LV= Cup was not too disappointed by the performance of his side.

He said: "We were pretty pleased with how things were going and we were getting it right until about 20 minutes to go.

"It's hard to criticise the boys but we did it trying to chase the game and, tactically, started to get it a bit wrong.

"We put a couple of poor kicks into the air which then almost made us lock down and stopped us kicking at all - but you have got to kick tactically when the opposition are coming at you with a blanket defence.

"You have still got to play territory and try and control the game but in the last 20 minutes we put pressure on ourselves."