Nigeria international Victor Moses' loan move to Spartak Moscow may have hit a snag following the delay in his medical.
In September, Chelsea boss Frank Lampard revealed that Moses was not part of the team's group testing for coronavirus which proved he had become surplus to requirements.
"We have a bubble at the training ground with the first-team squad, which Victor hasn’t been part of. I know Victor well and we will see how that develops," Lampard said.
The Blues are yet to secure loan moves for wantaway Danny Drinkwater, Jake Clarke-Salter and Ghana international Baba Rahman.
The Russian transfer window is set to conclude on Saturday, October 17.