Italy boss Mancini has admitted to accidentally leaving Giorgio Chiellini on the bench against Bosnia & Herzegovina, claiming "I didn't have my glasses on" when the team-sheets were submitted.
Bosnia earned a credible 1-1 draw away to Italy at Stadio Artemio Franchi on Friday night.
Roma striker Edin Dzeko opened the scoring for the visitors 57 minutes into the game, before Inter midfielder Stefano Sensi hit an equaliser ten minutes later.
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Italy captain Chiellini watched on as an unused substitute having been replaced by Francesco Acerbi in Mancini's starting XI, which raised more than a few eyebrows.