Christopher Nkunku has been earmarked for a possible return to training this week in a fitness boost for Mauricio Pochettino.
The French forward has been sidelined due to a hip problem since a substitute's appearance in Chelsea's 3-2 win at Luton at the end of last month.
Pochettino admitted he was 'worried' about the situation last week with the issue having prevented Nkunku from training for 10 days and ruling him out of three fixtures.
But Nkunku's injury is showing positive signs of progress increasing hopes about how soon he will be able to return.
Chelsea's players are due back in training later this week after being given three days off during their 10-day gap in fixtures.
Following Saturday's lunchtime Premier League win over Fulham Chelsea are not back in action again until they face Middlesbrough next Tuesday in the second leg of their Carabao Cup semi-final.
Chelsea will begin that 1-0 down following the first leg.
With Nkunku injured and Nicolas Jackson away at AFCON with Senegal Chelsea's attacking options have been left depleted.
Nkunku has featured just four times for Chelsea after missing the first four months of the campaign due to a knee injury picked up in pre-season.
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