Middlesbrough are targeting two new additions in January, with Bolton Wanders Mark Davies reportedly high up on their wishlist.
Boro have seen both Bruno Zuculini and Jack Stephens leave, after their loan spells at the club expired, and Karanka admits that Boro need to replace the pair.
The Spanish boss says that he needs two new players in January, to ensure that they have the quality required to achieve promotion this season.
“We need to bring some players in especially after losing players like Zuculini and Jack Stephens, but we have to be calm," he said.
“The players who are here deserve to be playing because they are at the top of the table, we don’t need to change a lot of things. It is nice to be where we are without needing anything special.
“In football you never know, maybe we will have a surprise tomorrow but today I can’t say that anything is done soon.
“We need to strengthen the squad because if something happens to some positions we will have problems.
“We need one or two players in, but again we are not in a rush, we have to bring in the right player and it is good to be in that position. We are playing really well, we have really good players, so the players who come will improve the squad because they will be good players.”
The Northern Echo suggests that Bolton Wanderers Mark Davies is a transfer target whose name is being regularly talked about by Karanka and his staff.
The same paper also suggests that Chelsea striker Patrick Bamford and Fulham’s Ross McCormack are on the club’s wishlist.
Boro are keen to bring in a front man, as there is a feeling that their attacking play could improve slightly - despite their hugely impressive form in the Championship this season.
Karanka’s men have established a four point lead at the top of the table, and they are in a commanding position to earn promotion to the Premier League.