Elliot Daly among England trio injured as Wasps earn victory over Northampton
Elliot Daly is an injury concern for England (Paul Harding/PA)
England are awaiting injury updates on Elliot Daly, Matt Mullan and Piers Francis after the trio were hurt during Wasps' 38-22 Aviva Premiership win at Northampton.
Daly failed to appear for the second half because of a problem with his left knee, Mullan sustained damage to his right elbow and biceps and Francis had to be helped from the pitch because of an ankle complaint.
All three have been named in England's initial squad for the autumn opener against Argentina at Twickenham on November 11 but their participation in next week's training camp in Portugal is now in doubt.
"Elliot went off with a knee injury. Hopefully it's just a collision injury, as in it's a bump that will settle down," Wasps director of rugby Dai Young said.
"Obviously it's a concern when anyone goes off with a knee injury, but it doesn't look too bad. It may be a ligament strain or it could be a contact injury.
"We're not going to know for the next 48 hours really. He's walking around on it fine so our medics will speak to the England guys and decide what to do.
"Matt Mullan initially looked like a shoulder but I think it's more his elbow/biceps. It looks quite painful and I'm not quite sure on the turnaround on that.
"It would be a real shame if either of them miss the autumn internationals because they have worked really hard - Matt to get back into the squad and Elliot to establish himself as a regular."
Francis, the New Zealand-born playmaker who was first capped against Argentina in June, faces an uncertain 48 hours as he waits for news on the severity of his injury.
"Piers has done something to his ankle. We're not exactly sure what it is. He did it early in the game and then got another knock. Hopefully it's not too bad," said Northampton director of rugby Jim Mallinder.
Wasps demonstrated further signs of revival after their five-match losing run ended against Harlequins last weekend by completing a comfortable bonus-point victory at Franklin's Gardens, founded on tries by Christian Wade, Ashley Johnson, Josh Bassett and Juan de Jongh.
Last season's Premiership runners-up would have crossed for a fifth try had Dan Robson's effort not been unjustly disallowed for a foot in touch.
"It wasn't perfect by any stretch of the imagination, but I would have settled for that before the game," Young said.
"Winning last week gave us some confidence and we got a monkey off our back and this was a really good performance.
"When your luck is out, things like the Dan Robson try tend to go against you. I started to fear the worst because we'd worked hard to get our noses in front only for a perfectly good try to be disallowed.
"You want the refs to get those right. I didn't know why he didn't go to the TMO (television match official) - he went to the TMO for everything else."