SWANSEA City are being linked with a move for Bolton's Spanish left-back Marcos Alonso.
Alonso, who began his career with Real Madrid, is out of contract at the end of the season and could be available for a reduced price.
Swansea's first-choice left-back Neil Taylor has been ruled out for the season with a broken ankle he suffered in September, and teenager Ben Davies has deputised impressively for the Wales defender.
The Swans also have Dwight Tiendalli to cover on both sides of the defence, but Michael Laudrup is said to be keen on Alonso, who played alongside Laudrup's son Andreas in the Real Madrid youth team.
The 22-year-old has represented Spain at under-19 level and has made eight appearances for Championship side Bolton so far this term.
Wanderers are understood to be open to offers for Alonso but, with fellow left-back Stephen Warnock returning to Aston Villa after a loan spell at the Reebok Stadium, Bolton might want to delay a move with former Swan Sam Ricketts their only other option in that position.
Another drawback in any potential deal is the fact that Alonso would be cup-tied in the Capital One Cup, having played for Bolton in their second-round defeat to Crawley earlier this season.
Laudrup has said he will be looking to strengthen all areas of his team during the January transfer window, and Swansea midfielder Leon Britton believes this will be the most important month of the club's season.
The Swans began the New Year with a 2-2 draw against Aston Villa at the Liberty, while Arsenal visit in the FA Cup this Sunday.
And after that comes the first leg of a Capital One Cup semi-final against Chelsea in West London.
The stalemate with Villa lifted Swansea up to 29 points as they close in on the 40-point total generally considered enough for top-flight survival.
With other league games against Everton, Stoke and Sunderland to come before January is out, Laudrup's side could make significant strides on three fronts over the coming weeks.
"We know these next four to six weeks could shape our season," said Britton.
"It's not been too bad in the last four games, but there's still a lot of football to be played in a short space of time.
"There's a lot of points to pick up and the chance to reach a final."
Swansea went unbeaten in four over the Christmas period after drawing with Manchester United, Reading and Villa and beating Fulham.
That represents a satisfactory return, though Swansea should have beaten VIlla.
They missed a glut of first-half chances to add to Wayne Routledge's goal and conceded an equaliser just before the break.
"It's not been too bad. We've not lost, but I'm still frustrated that on Tuesday we didn't get the win," said Britton.
"It's a decent return, we've got 29 points, and now we can look forward to two cup games.
"Against Villa, it was relief to get a point because we were on the verge of picking nothing up from the game, which would have been a bit of an injustice.
"To get a point in the end, we were delighted with it being literally the last kick of the game.
"It wasn't great, but we could easily be sat here talking about having been 4-0 up at half-time."