Sunderland's emphatic victory over Crystal Palace may have come at a cost - with David Moyes sweating over the fitness of three players.
John O'Shea, Adnan Januzaj and Jack Rodwell were all taken off with injuries during the 4-0 win over Crystal Palace at Selhurst Park.
Skipper O'Shea and Rodwell suffered hamstring injuries, with Belgian playmaker Januzaj taken off with a hip injury.
Januzaj was enjoying one of his best games in a Sunderland shirt, setting up Jermain Defoe's double in added on time before half-time.
Moyes said: "Januzaj came off with a hip injury. He played very well, he put in a great through ball for Jermain Defoe's second goal.
"Jack came off feeling his hamstring, that would be a real blow for us. Jack has been coming into some much better form.
"We have bought a couple of players in, we can't afford to lose any.
"John O'Shea is feeling his hamstring a little bit too. There you go."
Moyes handed a full debut to Bryan Oviedo, who signed on deadline day from Everton, while Joleon Lescott and Darron Gibson came off the bench to make their Sunderland debuts.
Moyes said: "Oviedo was terrific, he was up against Zaha, who we know is a threat.
"I thought we had some really good performances. Against Tottenham we were very resilient but I didn't think we played very well.
"We played much better with the ball against Palace than we did in midweek."