The 22-year-old Club Brugge defender is currently recovering from a broken metatarsal, which Palace were aware of when negotiating the deal. However, the injury is understood to be worse than the Eagles originally believed. This has put the Premier League club in a difficult position, with a final decision yet to be made about whether to proceed with the deal.
Palace had initially agreed an initial loan for Ordonez that included an option to buy at the end of the season, after hijacking Aston Villa's move for the Ecuador centre-back. Despite this, the club has accelerated their efforts to sign a new centre-back, following Chadi Riad's injury against Everton on Saturday. They have since completed a deal to sign Axel Disasi on loan from Chelsea, but want to add another central defender to the squad.
The uncertainty surrounding Ordonez's move leaves Palace with a pressing need to find a suitable replacement, with a decision expected in the coming days.