Rennes goalkeeper Edouard Mendy is undergoing a medical with Chelsea as he prepares to join the club, Blues manager Frank Lampard says.
The Senegal keeper, 28, will compete with the £71m Kepa Arrizabalaga, the club's record signing.
Kepa was at fault for Liverpool's second goal in the 2-0 Premier League defeat on Sunday, which was described as "a clear mistake" by Lampard.
"We have brought Mendy in for that competition," Lampard said.
"I don't know what benefits in the long run, football is in your hands. Competition is a regular thing.