Brentford expect to confirm the signing of Aaron Hickey from Bologna this week, with the Scotland defender due to fly to England on Tuesday for a medical.
The Premier League club have agreed to pay €22m (£18.9m) for the 20-year-old, who joined Bologna from Hearts just under two years ago.
Hickey has played 48 times for the Serie A club, starting 34 of their league games last season. The left-back, who can play in various other positions, is poised to sign a contract to 2027.
Brentford have not made a summer signing and suffered a setback on Monday when Christian Eriksen informed them he had chosen to join Manchester United rather than continue at the club.
Leeds United are close to finalising a deal to buy the Colombia winger Luis Sinisterra from Feyenoord for €25m, including add-ons. Personal terms have been agreed with the 23-year-old and, subject to final details, he should join the midfielder Tyler Adams in coming to Leeds in the coming days. Adams will cost up to £20m from RB Leipzig.
Nottingham Forest have agreed a deal with Mainz to make the centre-back Moussa Niakhaté their fourth signing after the forward Taiwo Awoniyi, the goalkeeper Dean Henderson and Giulian Biancone, another defender. They will pay €10m and up to €5m in add-ons for Niakhaté.