The Sheffield United captain, Billy Sharp, his wished a speedy recovery to his Leeds United counterpart, Liam Cooper.
Cooper was forced off during Saturday's meeting of the two sides at Bramall Lane and underwent surgery on his injured knee in Rome on Wednesday.
Successful op, now to get back on the mend.. Could have been a lot worse! Big thanks to our medical staff for the swift process! Also a massive thanks to Professor Mariani and all the staff @VillaStuart— Liam Cooper (@LiamCooper__) December 5, 2018
Massive month coming up for the club! Let’s go.. MOT pic.twitter.com/y5uBdzWtmw
According to Leeds' official website, the 27-year-old expected to spend up to six weeks on the sidelines.
And Sharp, who signed for the Whites on the same day as Cooper in August 2014, sent the following message to his former teammate earlier:
Speaking to the Sheffield Star last week, Sharp revealed that Cooper is the only Leeds player with whom he has remained close friends.
"I spoke to him on Saturday (a week before Leeds' trip to Sheffield United), but I have not spoken to him since we both won the games in midweek.
"I am sure we will have a text and one maybe afterwards."
Cooper is one of six senior players currently unavailable to the Leeds manager, Marcelo Bielsa, alongside Luke Ayling, Gaetano Berardi, Stuart Dallas, Izzy Brown and Patrick Bamford.
The Whites have also had to send Jamal Blackman back to Chelsea after the former Sheffield United loanee suffered a broken leg.