Swansea boss Carlos Carvahal is determined to hold onto rumoured West Ham transfer target Alfie Mawson this month.
Mawson has been linked with a move away from the Liberty Stadium – with Watford and Celtic also interested in the 23-year-old.
However, the Portuguese has been assured by chairman Huw Jenkins the centre-half will not be leaving.
"When I signed (as manager last month) it was very clear we would try and bring in players to improve the team," he said.
"We will not sell the best players in January, the message is clear.