Newcastle United manager Rafael Benitez says it is too early to know the full extent of the injuries suffered by his side in their 2-1 win at Brentford.
Championship top scorer Dwight Gayle put the visitors ahead and helped Newcastle return to the top of the table before going off injured.
Defender Isaac Hayden and midfielder Vurnon Anita were also forced off hurt.
"Gayle and Hayden have muscle problems. Anita was a bad tackle on his ankle," Benitez told BBC Radio Newcastle.
"But it is too early to know. Our club doctor will let me know.