Chelsea manager Mauricio Pochettino hailed Conor Gallagher as a "priceless" player after his two goals inspired the Blues to victory at Crystal Palace.
Gallagher cancelled out Jefferson Lerma's opener and scored again in the 91st minute before Enzo Fernandez got a late third to seal a 3-1 win.
The 24-year-old has been linked with moves away from the club.
"I think he is a player with a great commitment to the team," said the Chelsea manager.
"He is always trying to compensate in every situation, in offensive and defensive situations. It's priceless to have a player like him.