The Gers signed a host of midfielders over the summer, but Warburton has suffered a number of problems in the middle of the par to leave him short of options ahead of the January transfer window.
Liverpool manager Juergen Klopp and Joao Carlos Teixeira
Joey Barton has been released following a bust-up with manager Warburton and team-mate Andy Halliday, Niko Kranjcar is out for the rest of the season, whilst Jordan Rossiter and Matt Crooks have both suffered injury problems.
Warburton must now find another midfielder, and it seems that he's looking towards Europe for a new playmaker, with Porto's Joao Teixeira allegedly being targeted.
Joao Carlos Teixeira in action with Augburg's Paul Verhaegh
The Daily Mail report that Rangers want to take Teixeira on loan when the transfer window opens next month, given that he's still yet to feature for Porto after joining the club over the summer.
The 23-year-old may be familiar to some fans as he was on the books with Liverpool, a move which came about after academy manager Frank McParland – now Rangers' Head of Recruitment – spotted him playing for Sporting Lisbon and took him to Anfield.
Joao Carlos Teixeira in action with Exeter's Matthew Oakley
Playmaker Teixeira left Liverpool over the summer after just eight appearances for the club, joining Champions League side Porto back in his native Portugal, but he's yet to feature for them.
Now, with McParland no doubt driving the interest, Rangers are allegedly hoping to take Teixeira on loan in January, providing some creativity and spark to Warburton's side whilst potentially becoming the latest player to feature for both Porto and Rangers, after Nuno Capucho and Pedro Mendes.
Would you like to see Rangers sign Teixeira?