Sheffield United boss Chris Wilder insists the squad's contract situation isn't a concern.

As many as 18 senior players will come off contract in June.

Wilder said: "Not a concern to me at all, no.

"If I have to bring 15 players in, then that'll be the situation. If I have to do it, I have to do it. There's a reason they haven't signed the contracts. They might be offered something else, there might be a situation where I think these boys can't take us forward. They understand that as players, that's what happens.

"Of course in an ideal world we wouldn't like as many out of contract but it is what it is and this is still an incredibly attractive place to come and play football. Whether you're coming through the academy, a young player on loan or a mid or seasoned senior pro, nights like Wednesday night [against Liverpool] and days like Saturday afternoon [victory over Brentford] are an easy sell for me."