West Ham have confirmed the free-transfer signing of Romanian full-back Razvan Rat on an initial one-year deal.
Ajax coach Frank de Boer has agreed a new four-year contract with the Eredivisie champions.
Valencia have confirmed the appointment of Ernesto Valverde as their new coach on a deal until the end of the season.
Valverde succeeds Mauricio Pellegrino, who was sacked just hours after the club's 5-2 defeat at home to Real Sociedad on Saturday.
Valverde, 48, has previously coached Athletic Bilbao, Espanyol and Villarreal in Spain as well as two spells with Greek club Olympiacos.