Nacaer Chadli had completed his move to West Brom from Tottenham Hotspur for an undisclosed fee. Chadli, 27, has signed a four-year deal with the Baggies, becoming just their second signing of the summer transfer window.
The Belgium international netted seven goals for Mauricio Pochettino's side last season but saw his role in the squad reduced as the season wore on. After arriving from Dutch club FC Twente in 2013, he made 119 appearances in all competitions, scoring 25 goals in total. Spurs confirmed his departure on their official website.
"I feel very good to be here," Chadli told West Brom's official website having been given the no. 22 shirt at the Hawthorns. "It came very quickly but I spoke to the club and they had a good team, a good manager and I am very pleased to be here.
"My ambitions? I just want to help the team win as many games as possible."
West Brom boss Tony Pulis said: "He is a top, top player and I am delighted we've got him. I said last week that these signings all had to be about players who would improve our squad – and Nacer does precisely that."
Chadli is the fourth permanent departure from White Hart Lane this summer. DeAndre Yedlin has parted company just two years on from signing the club, joining Newcastle United while Alex Pritchard has signed for their Championship rivals Norwich City. Dominic Ball has also joined Rotherham United on a permanent deal. Federico Fazio and Nabil Bentaleb have also left the club on loan deals, joining Roma and Schalke respectively.
The north London side have still only made two additions to their squad, however, in the form of Netherlands striker Vincent Janssen and former Southampton midfielder Vincent Wanyama.