Truffert, who has joined the Cherries in an initial £10.1m deal which could rise to £14.3m, is seen as Kerkez’s replacement at left-back.
Sky Sports News understands Truffert would only have completed his move to Bournemouth if Kerkez was set for Anfield.
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Bournemouth faced competition for Truffert, 23, who had been the subject of interest from other sides in Europe and the Premier League.
More to follow.