Swansea have been dealt a blow after it was confirmed that their Spanish forward Michu is likely to be sidelined for six weeks when he undergoes ankle surgery.

The 27-year-old, who has scored 28 goals for Swansea since joining from Rayo Vallecano in the summer of 2012, has been hindered by ankle and knee issues throughout this season.

The Spain international's frustrations have been clear to see and Swansea's manager, Michael Laudrup, has said the player will need to undergo a procedure on his right ankle.

"It's not good news," Laudrup said. "Unfortunately it has been confirmed that he will need an operation. It can be done in the next week and he should be back playing in around a month and a half."

The loss of Michu further dents Swansea's attacking resources with the winger Nathan Dyer likely to be sidelined until February after suffering an ankle ligament injury in the recent draw at Norwich.

Laudrup admits it is likely he will look to bring in a forward during the January transfer window.

Laudrup said: "What has happened in the last couple of weeks has changed things. We will probably do something now in January and try to add something that we don't have in certain positions.

"The numbers are a bit down and that is risky for the last four months of the season."

Among the players Laudrup has been linked with is the Liverpool striker Iago Aspas, whom he pursued last summer, but the manager believes it may prove a difficult deal to pull off.

"He is an interesting player, he was on our list in the summer," he said. "But he is at Liverpool and they have injuries too.

"Daniel Sturridge is out at the moment, so apart from Luis Suárez they don't have many forwards right now so I don't think that will happen."