Albion have made Portsmouth centre-back Matt Clarke their first signing of the summer.

The 22-year-old has agreed a four-year deal and arrives for an undisclosed fee believed to be about £3.5 million plus potential add-ons.

He is the first addition since Graham Potter took over as head coach last month.

Potter, who scouted Clarke before taking over at Albion, said: “We are pleased to welcome Matt to the club.

“He’s an imposing central defender and had a very impressive spell with Portsmouth and as their captain has been a key player for them.

“At 22, Matt has already played a good number of games in the EFL and we are really looking forward to working with him.

“His challenge now is to compete with our existing centre-halves — an area where we have a lot of competition — and break into our first team.”