Diego Costa suffered a bruised tibia in Saturday's draw with Everton, but it remains to be seen how much time the Chelsea striker might miss.
Costa was sent for a scan on the shin after leaving the field at Stamford Bridge and Press Association Sport understands the results show no fracture and just bruising.
But it is too soon to say whether Costa, who was injured when challenging Leighton Baines in the second half, will be able to feature in Sunday's Premier League clash at Arsenal.
The 27-year-old Brazil-born Spain international reported for treatment at Chelsea's Surrey training base on Sunday, despite the squad being given two days' off by interim boss Guus Hiddink.
Costa scored Chelsea's first as the Blues came back from 2-0 down to level at 2-2, with John Terry's controversial last-gasp goal in stoppage time giving them a point from a 3-3 draw.
The former Atletico Madrid front man had scored just seven times since January 2015 before Jose Mourinho's departure last month.
But Costa now has five goals in his last five appearances.
Loic Remy could start at Arsenal, with Radamel Falcao out since October with a thigh problem.
The latest injury to Costa could see Chelsea make a move for a striker in the transfer window, although whether the player they want or need is available in mid-season remains to be seen.
Hiddink on Friday suggested teams making signings in January were "desperate".
Chelsea have been linked with a host of strikers of late, including Jamie Vardy, although it is hard to see him leaving title-chasing Leicester for the fallen Premier League champions.
The Blues are 14th with 16 games to go and well adrift of Champions League qualification.