Nottingham Forest have signed Chelsea winger Callum Hudson-Odoi and Bologna captain Nicolas Dominguez on permanent transfers and Arsenal full-back Nuno Tavares on loan.
Hudson-Odoi, 22, who has three caps for England, moves to Forest on a three-year deal for a fee of under £5m after making 156 appearances for the Blues.
Argentina midfielder Dominguez, 25, signs a five-year deal.
Forest's Swiss midfielder Remo Freuler went the opposite way to Bologna.
Hudson-Odoi spent last season on loan at Bayer Leverkusen, with Forest beating Fulham to the signing.
"It's massive for me to be here and I can't wait to get started.