The Rangers boss said questions about the player's long-term plans should be directed to his agent.
The Rangers manager saw his team progress in Europe with a 5-0 win over Lincoln Red Imps.
The Rangers forward was left out of the squad to face Kilmarnock last week.
The Rangers manager insists he is under no pressure to sell the Colombian striker.
The Rangers boss wants an independent investigation into the SPFL's handling of the matter.
Jermain Defoe has backed Steven Gerrard after Rangers exited the Scottish Cup at the hands of Hearts.
Rangers star Ianis Hagi insists they fear no one in the last 16 of the Europa League.
A 1-0 win over Braga in Portugal ensured progress for the Ibrox side.
The Ibrox boss believes referee Euan Anderson should've awarded Rangers a penalty for an apparent handball.
The former England international has spent the last year with the Light Blues on loan from Bournemouth.
The Ibrox club have received notices of complaint that could lead to bans and fines.
The Rangers captain will only miss a handful of games.