Leon Dajaku injury update after Sunderland winger taken off in Ipswich Town draw
Sunderland face an anxious wait to see if Leon Dajaku has suffered any significant damage after a first-half injury at Ipswich Town on Saturday afternoon.
Dajaku needed assistance to leave the field after a strong challenge from Sam Morsy, the German winger unable to walk as he headed for the tunnel.
Dajaku's form had been improving considerably in recent weeks .
"It's a contact injury," Johnson said.
"He was in a fair bit of pain but we'll have to take a look.
"It was an interesting game for him in terms of his learning, I don't think he started well or physical enough.
"He grew into it and was having a really good spell, so it was a bad time for him to get the knock."
One major positive for the Black Cats was that Denver Hume was able to replace Dajaku, and came through an hour unscathed following a lengthy absence with an ankle injury.
Dennis Cirkin is expected to return in the not too distant future, giving Johnson some valuable depth in a squad that has struggled with a long list of injury issues in recent weeks.
"Denver should get a lot of credit for that and so should the physio department," Johnson said.
"He's trained one week after a long lay-off, and he looked like he could have got through 90."