Swansea City full-back Marcos Painter could be sidelined for a month after aggravating a hamstring injury.
Painter made his first appearance for three weeks against Northampton Town on Saturday after originally hurting his hamstring against Milton Keynes Dons last month.
But the former Birmingham City youngster was replaced at half-time at Northampton and could miss the next few weeks of Swansea's promotion push.
"He will have an injection in the next day or two,'' Swans manager Roberto Martinez told the club's official website.
"We'll have to wait to see how he reacts to it.
"If everything goes okay he'll be out for two to three weeks, but depending on the response it could be four or five.''