Manchester United are reportedly set to hand Juan Mata and Marouane Fellaini new contracts, while Ander Herrera and Phil Jones are also in line for new deals before the end of the year.
According to Daniel Cutts at The Sun, Jose Mourinho is keen to avoid any of his first-team stars leaving for free next summer.
Mata, Herrera and Fellaini are all out of contract next year but have been in negotiations "for a number of weeks over extensions and improved terms."
Mata's future at Old Trafford looked uncertain when Mourinho took over, as he was Chelsea manager when the Blues sold the midfielder to United in 2014.