The Swede was withdrawn at half-time in Monday's reverse at Villa Park with an Achilles injury, but the problem did not prove to be too serious and there is still a possibility of him featuring against Boro.
"Erik didn't train today, we'll have another look at him tomorrow to see if he can play or be in the squad," said Martin this afternoon. "Anthony Gardner still has a slight problem with his foot, he trained today but it is a bit up and down. He is a question mark still.
After revealing that Rohan Ricketts has been added to an 18-man squad, Martin reported good progress on players who have suffered slightly longer-term injuries.
"Stephen Kelly is still doing his rehab following his concussion and thumb injury and will be back next week.
"Goran Bunjevcevic came back and trained today after an awful injury - he can hopefully be back in full training in two weeks time. Sean Davis is doing well but after his operation he needs at least another month."
Martin Jol said a late decision will be taken on Erik Edman's fitness for Sunday's clash with Middlesbrough at the Lane.