Middlesbrough boss Tony Mowbray has warned Swansea over the pursuit of duo Leroy Lita and Marvin Emnes.
The Swans had a £2 million bid for the attacking pair rejected by Boro, but are keen to negotiate ahead of their first season in the Premier League.
Mowbray, however, is bullish over losing the duo after being forced into the sale of Didier Digard, Andrew Taylor and Kris Boyd this summer.
"In my own mind, I think if Swansea have got any real, genuine interest they should let us know," he told the Journal. "Maybe that was why their chief scout was there - I don't know. Do they know enough about these players? I'd like to think that they do.
"What I would say is that the closer it gets to the start of the season, the less likely we are to want to let any of them go. There's no fire sale on."
Mowbray added: "The chairman has stated pretty clearly that if the deal doesn't suit our football club, there's no deal to be done.
"It's about getting a balance. We need to readjust the finances and as we do that, we'll take each proposed deal as it comes along and decide whether it is good for us or not good for us.
"At the moment, there are no deals for either of our strikers that is suitable for us."