Chelsea manager Jose Mourinho was asked about his injured players on Friday, and the news on both Gary Cahill and Diego Costa was positive. According to Mourinho, it's "all good", and both players will be available to be selected against Arsenal:
Jose Mourinho says Diego Costa and Gary Cahill are both available for Sunday's game. #CFC— Chelsea FC (@ChelseaFC) July 31, 2015
Personally, I'd probably sit Diego Costa out, as I live in constant fear of another hamstring issue forcing him to miss important matches down the line. This also seems like an ideal match to use the pace of Loic Remy to get in behind the Arsenal high line, and the rhinoceros impersonator, Per Mertesacker.
The Chelsea boss doesn't think jet lag will be an issue for the Blues, either, even though they flew back from the United States on Tuesday:
Jose says jetlag will play no part in our game on Sunday. 'We are fine.' #CFC— Chelsea FC (@ChelseaFC) July 31, 2015
Mourniho will likely play his strongest possible eleven on Sunday, looking to remind Arsene Wenger of who the best club in England is before the season officially gets underway.