Chelsea's medical staff have been informed of their top goalscorer's situation, but his condition doesn't appear too worrying for the west London outfit.
Antonio Conte will hope Costa returns to Stamford Bridge injury-free and ready to play on Saturday (3pm).
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Thibaut Courtois won't play against Russia due to a minor hip problem. Expected to be fit against Crystal Palace, though. #cfcpic.twitter.com/oOV1wTDodR
— Kristof Terreur ������ (@HLNinEngeland) March 26, 2017
The Blues host Crystal Palace where they will look to extend their lead at the top of the Premier League table.
Another Chelsea ace to suffer an injury while away on international duty is goalkeeper Thibaut Courtois.