Sterling arrived at Chelsea last summer in a £47.5million deal, searching for a more prominent first-team role after slipping down the pecking order at Manchester City. With only four Premier League goals all season, he is on course to notch his worst tally since breaking through as a teenager in 2012/13.
Koulibaly, meanwhile, arrived as one of the most sought-after defenders in Europe after eight superb years at Napoli. The 31-year-old is yet to unanimously win over supporters, however, despite occupying a huge chunk of the wage bill.
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