The Spurs midfielder made his comeback from injury with a substitutes appearance against Wolves last weekend but was an unused sub in Wednesday night's home win against Manchester City.
However, manager Harry Redknapp has revealed that Modric has an ankle injury and won't travel with the Spurs squad for the match at Ewood Park this Saturday.
"Luka's got a bit of a ankle problem and he won't be fit for Blackburn," Redknapp has said..