Sunderland manager Steve Bruce has made a second offer for Wigan Athletic midfielder Lee Cattermole.
The Latics rejected an offer from their former manager for the England Under-21 international last week.
It is believed that the Black Cats have increased their bid to around £6million, just 12 months after then Wigan boss Bruce paid Middlesbrough £3.5million for Cattermole.
New Wigan manager Roberto Martinez told his club's official website last week: "Lee isn't for sale. End of story.
"He's a fantastic player, a leader on and off the field, and he's central to our plans going forwards. We aren't interested in selling him which is why this offer was rejected immediately.
"It isn't usually our style to discuss incoming or outgoing transfers until they're completed, but we've made an exception in this case because I feel so strongly about wanting to keep hold of Lee, along with all my best players.
"He's currently on a well-earned break after his efforts with the Under-21s in the summer and will be reporting back to training next week. I'm looking forward to working with him.
"He's one of many talented players we have here and I intend to keep hold of all of our best players. Let's forget about this now and move on."
Bruce completed the signing of Fraizer Campbell at the weekend and continues to be linked with Portsmouth's Peter Crouch and Middlesbrough midfielder Tuncay.
Meanwhile, Dean Whitehead and Daryl Murphy are set to move to Ipswich Town where they will be reunited with former Sunderland manager Roy Keane.