Sporting Lisbon president Bruno de Carvalho has warned Premier League clubs off their stars.
De Carvalho told A Bola: "The club has decided that there will be no sales in January.
"The club is leading the division for the first time in nine years and we are determined to fight for the title.
"Only if a ridiculous offer is put in for a player will it be studied."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball