Maurizio Sarri thinks it is "impossible" for Willian to leave Chelsea in January despite reports suggesting he could be part of a swap deal with Barcelona involving the out-of-favour Malcom.
Brazil international Willian was the subject of strong speculation in pre-season, with Barcelona reportedly having offers for him rejected.
In the end, Barca signed Malcom from Bordeaux to bolster their wide options, but the 21-year-old has hardly featured, playing just five times in La Liga.
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Malcom cost Barca €41 million (£38m/$47m) and his slow start has seen a number of transfer and loan links crop up, with Everton originally thought to be front-runners before Marco Silva denied interest.