LONDON, ENGLAND - AUGUST 03: General view of a moody sky over the stadium during the pre-season friendly between Chelsea and Fiorentina at Stamford Bridge on August 5, 2015 in London, England. (Photo by Catherine Ivill - AMA/Getty Images)
LONDON, ENGLAND - AUGUST 03: General view of a moody sky over the stadium during the pre-season friendly between Chelsea and Fiorentina at Stamford Bridge on August 5, 2015 in London, England. (Photo by Catherine Ivill - AMA/Getty Images)