It has been reported that Manchester City-linked left-back Valentin Barco is set to undergo a medical ahead of his transfer to Brighton & Hove Albion for a fee of £7.8 million ($10 million). It was revealed on Tuesday that City decided not to sign the Argentine due to worries about his attitude as he is believed to have had rifts with Boca Juniors’ management. As tweeted by The Athletic journalist David Ornstein, the 19-year-old, who once looked destined to play under Pep Guardiola is now close to working under Roberto De Zerbi at Brighton. David Ornstein: Manchester City target Valentin Barco…