Celtic will aim to sign one more player before next week's transfer deadline, says chief executive Peter Lawwell.
Scottish Premiership Football
Celtic are drawn to face Barcelona, Manchester City and Borussia Monchengladbach in Champions League Group C.
Ross County complete the signing of central midfielder Tim Chow on a two-year contract, following his exit from Wigan.
Inverness CT manager Richie Foran signs up French forward Lonsana Doumbouya on a two-year deal.
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Leigh Griffiths says Celtic's flight back from Israel would have been "10 times as hard" had they not secured a Champions League group stage place.