Matthew Pennington is currently on loan at Ipswich from Everton

Derby County have made an approach to Ipswich for defender Matthew Pennington, Sky Sports News understands.

Pennington is currently on loan at Ipswich from Everton, so Derby are negotiating with both clubs over a possible loan deal.

Lampard's top priority in the January window is a centre-back - but if he succeeds in freeing up more cash - via loan moves for some of his out-of-favour players, he will look to bring in a midfielder, according to Sky sources.

1:19 Derby manager Frank Lampard says it's crucial that the club bring in defensive reinforcements before the transfer window closes Derby manager Frank Lampard says it's crucial that the club bring in defensive reinforcements before the transfer window closes

Derby are reportedly interested in bringing Leicester's Andy King to Pride Park on a loan deal.

Meanwhile, Sky sources understand Derby midfielder Tom Huddlestone is in talks with Udinese over a permanent move.