Frank Lampard has confirmed N'Golo Kante has a hamstring problem, but is hopeful that his injury isn't too serious with his star midfielder key to turning around a run of poor form.
Kante has been ever-present during the run, starting the last four games in a 10-day period.
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After being hit by injury last season, Kante had stayed fit until now, but he joins Reece James and Andreas Christensen on the injured list ahead of the FA Cup third-round clash with Morecambe at Stamford Bridge on Sunday.