It was no secret that Forest wanted to reinforce their defensive ranks last month, with Michael Dawson and Michael Hefele both struggling with injuries in recent weeks. Danny Fox, meanwhile, left for Wigan Athletic, leaving the two-time European Cup winners short of options at the back.
By the time the window slammed shut, Forest had secured the signatures of Yohan Benalouane and Molla Wague, signing the duo from Leicester and Udinese respectively, while Sweden international Alexander Milosevic arrived on a free.
One player they failed to bring in, however, is 27-year-old Raillo.
"It was a very good opportunity,” the Spaniard told AS when asked about Forest's interest.
“But I left with a smile (at the end of the window). No one will be able to say that I threw in the towel and didn’t give everything for the club."
Raillo, who played for Espanyol before moving to Mallorca in 2016, has made 22 appearances in the Spanish second tier this season with his side sitting eighth in the table.
Fortunately for Forest, they have improved at the back under Martin O’Neill, keeping a clean sheet against Preston North End on Saturday.
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