text: Mamadou Sakho limped off early on in Liverpool's 1-0 FA Cup sixth round replay win over Blackburn Rovers to leave Brendan Rodgers with just two available first-team centre backs. The French defender was limping heavily and clutching his hamstring after a clearance on the edge of his own penalty area before being withdrawn after just 28 minutes at Ewood Park. Sakho was replaced by Kolo Toure, who partnered Dejan Lovren in a threadbare four-man defence with Emre Can and Martin Skrtel already unavailable. Mamadou Sakho limped off early on in Liverpool's 1-0 FA Cup sixth round replay win over Blackburn Rovers . Frenchman was limping heavily and clutching his hamstring after a clearance on the edge of his penalty area . German midfielder-cum-defender Can was serving a one match ban for a red card against Arsenal on Sunday, while Skrtel still has one game left of his three-game suspension for stamping on Manchester United goalkeeper David de Gea last month. Sakho will undergo scans on Thursday to determine the extent of the injury but he is already a doubt for Liverpool's Barclays Premier League clash with Newcastle United on Monday. Rodgers, who has tended to select three central defenders before the FA Cup replay, will be hoping the 25-year-old can return to action as soon as possible. Brendan Rodgers who has tended to select three central defenders, will be hoping for a quick recovery . Martin Skrtel (left), pictured on international duty, is still missing with a suspension picked up for a stamp .
target: Mamadou Sakho limped off in Liverpool's win over Blackburn Rovers .
  French defender looked to be suffering with hamstring trouble in first half .
  Brendan Rodgers forced to use pairing of Dejan Lovren and Kolo Toure .