The versatile defender is currently on loan with Middlesbrough, but Jimmy Floyd Hasselbaink is still hoping to strike a deal.
The 22-year-old is currently enjoying his second spell at Rangers' Championship rivals Middlesbrough. Despite being a first-team regular during his first spell and for much of his second, the Czech Republic international has recently found opportunities much more difficult to come by for the league leaders, with Aitor Karanka often opting for Emilio Nsue at right-back, the position where Kalas has been used most often since his return to the Riverside Stadium in the summer.
Get West London claims that the Hoops' boss and former Blues striker Jimmy Floyd Hasselbaink is hoping to convince his old club to terminate Kalas' loan - which is currently due to end at the end of the season - and instead allow him to move to Loftus Road.
With Friday's last-gasp defeat to Hull City leaving Hasselbaink's men languishing in the bottom-half of the table, the Dutchman will certainly be looking to strengthen his squad during the January window if he wishes to get the club's season back on track. Adding the likes of Kalas will help prevent defeats like the one they suffered against the Tigers, and may help propel the side back into the top-half.