Sheffield United have a mole! Chris Wilder vows to find out who has been leaking Blades' Premier League team news

According to the Daily Mail, the Blades' starting XI for recent games has been shared on WhatsApp and other social media platforms on the morning of their matches. Team news is usually announced an hour before a fixture but off the back of these leaks, manager Wilder is determined to track down the guilty party.

Ahead of Boxing Day's home clash against fellow strugglers Luton Town, he said: "I think it's a joke. Whoever did it, they've got another thing coming because they're harming the football club.

"Everybody will know the team [for Boxing Day] anyway because it will come out on Twitter at about half 10 in the morning. I will comment on it. It's quite difficult to keep the team quiet but I'm not happy about that situation. Whoever did it, I appreciate that. Thanks very much. I'm going to have to tighten everything up around the training ground. It's a lesson learnt for me as well. That person who did it. Call yourself a Sheffield United fan? I don't think they are. It's an absolute joke."

Wilder has had a positive start to his second spell at United, with one win, one draw, and two losses. They still sit bottom of the Premier League and stories like this are indicative that all is not well at the Blades. Despite a tough first half of the campaign, they are just five points from safety.

Following the Luton clash, United round off the year against defending Premier League champions Manchester City at the Etihad on December 30. While that game is less winnable, they will look to take all three points at home to the Hatters.